Improve the automatic key exchange function; fix some known problems;

19 files changed, 737 insertions, 581 deletions

diff --git a/include/gpg/GpgContext.h b/include/gpg/GpgContext.h
index fd9983bf..e6e81626 100644
--- a/include/gpg/GpgContext.h
+++ b/include/gpg/GpgContext.h
@@ -109,11 +109,12 @@ namespace GpgME {
 
         bool exportSecretKey(const GpgKey &key, QByteArray *outBuffer);
 
-        void getSigners(QVector<GpgKey> &signer);
+        void getSigners(QVector<GpgKey> &signer, gpgme_ctx_t ctx);
 
-        void setSigners(const QVector<GpgKey> &keys);
+        static void setSigners(const QVector<GpgKey> &keys, gpgme_ctx_t ctx);
 
-        bool signKey(const GpgKey &target, const QString &uid, const QDateTime *expires);
+        bool signKey(const GpgKey &target, const QVector<GpgKey> &keys, const QString &uid,
+                     const QDateTime *expires);
 
         bool revSign(const GpgKey &key, const GpgKeySignature &signature);
 
@@ -201,6 +202,8 @@ namespace GpgME {
 
         QMap<QString, GpgKey *> mKeyMap;
 
+        gpgme_ctx_t create_ctx();
+
         static gpgme_error_t readToBuffer(gpgme_data_t dataIn, QByteArray *outBuffer);
 
         void fetch_keys();
diff --git a/include/server/BaseAPI.h b/include/server/BaseAPI.h
index 20d7e7e9..4843413d 100644
--- a/include/server/BaseAPI.h
+++ b/include/server/BaseAPI.h
@@ -36,7 +36,7 @@ public:
 
     explicit BaseAPI(ComUtils::ServiceType serviceType);
 
-    ~BaseAPI() override;
+    virtual ~BaseAPI();
 
     void start();
 
diff --git a/resource/ts/gpgfrontend_en_us.ts b/resource/ts/gpgfrontend_en_us.ts
index a5f7be5a..9adfc9a4 100644
--- a/resource/ts/gpgfrontend_en_us.ts
+++ b/resource/ts/gpgfrontend_en_us.ts
@@ -481,100 +481,100 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="56"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="52"/>
         <source>Save Checked Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="59"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="55"/>
         <source>Save checked private keys on exit and restore them on next start.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="68"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="64"/>
         <source>Confirm drag&apos;n&apos;drop key import</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="71"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="67"/>
         <source>Import files dropped on the keylist without confirmation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="78"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="74"/>
         <source>Language</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="87"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="83"/>
         <source>&lt;b&gt;NOTE: &lt;/b&gt; GpgFrontend will restart automatically if you change the language!</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="92"/>
         <source>Own key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="100"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
         <source>Get Service Token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="101"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="230"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="97"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="234"/>
         <source>No Service Token Found</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="107"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="103"/>
         <source>&lt;none&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="124"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="120"/>
         <source>Key pair for synchronization and identity authentication</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="248"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="252"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="249"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="253"/>
         <source>Own Key can not be None while getting service token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="261"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="265"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="336"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="262"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="266"/>
         <source>Key Not Exists</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="337"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="345"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="350"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="346"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="351"/>
         <source>Succeed in getting service token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>There is a problem with the communication with the server</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2041,22 +2041,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="99"/>
         <source>Unsuccessful Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="101"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
         <source>Signature operation failed for UID </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="107"/>
         <source>Operation Complete</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="109"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
         <source>The signature operation of the UID is complete</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2169,8 +2169,8 @@
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="218"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="231"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2205,6 +2205,7 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="150"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="226"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="409"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="375"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2220,8 +2221,8 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="62"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="239"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="422"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="298"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
@@ -2229,15 +2230,15 @@
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="69"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="246"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="51"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="132"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="70"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="247"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2245,15 +2246,15 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="71"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="248"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="436"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="135"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="312"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="91"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="72"/>
         <source>Encrypting</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2269,7 +2270,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="268"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="150"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="151"/>
         <source>Signing</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2290,7 +2291,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="353"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="258"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="259"/>
         <source>Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2339,7 +2340,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="551"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="456"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="461"/>
         <source>Decrypting and Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2402,76 +2403,81 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="102"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="408"/>
         <source>Function Disabled</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="104"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="409"/>
         <source>Please go to the settings interface to enable and configure this function.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
         <source>The selected key contains a key that does not actually have a signature usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Short Crypto Text only supports Decrypt &amp; Verify.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="199"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="200"/>
         <source>Decrypting</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="410"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="376"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="415"/>
         <source>Service Token Empty</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="416"/>
         <source>Please go to the settings interface to set Own Key and get Service Token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Key Not Found.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="560"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="572"/>
         <source>Outdated Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="561"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="573"/>
         <source>This version(%1) is out of date, please update the latest version in time. </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="563"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="575"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="582"/>
         <source>You can download the latest version(%1) on Github Releases Page.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="567"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="579"/>
         <source>Unreleased Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="568"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="580"/>
         <source>This version(%1) has not been officially released and is not recommended for use in a production environment. &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2999,14 +3005,14 @@
 <context>
     <name>PubkeyGetter</name>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="79"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="66"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="90"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="80"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="104"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="67"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="91"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3014,22 +3020,22 @@
 <context>
     <name>PubkeyUploader</name>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="94"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="95"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="95"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="96"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="102"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="103"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="104"/>
         <source>Partial failure of automatic pubkey exchange</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3042,102 +3048,102 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="61"/>
         <source>One or More Bad Signatures.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="66"/>
         <source>A </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="70"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
         <source>Good </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="71"/>
         <source>Bad </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="76"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="74"/>
         <source>Expired </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="77"/>
         <source>Missing Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="82"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="80"/>
         <source>Revoked Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="85"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="83"/>
         <source>Expired Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="88"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="86"/>
         <source>Missing CRL&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="90"/>
         <source>Signature Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="94"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
         <source>Signature NOT Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="102"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="100"/>
         <source>Key is NOT present with ID 0x</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="109"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="107"/>
         <source>A signature could NOT be verified due to a Missing Key
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="113"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="111"/>
         <source>A signature is valid but the key used to verify the signature has been revoked
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="121"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="119"/>
         <source>A signature is valid but expired
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="128"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="126"/>
         <source>A signature is valid but the key used to verify the signature has expired.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="135"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="133"/>
         <source>There was some other error which prevented the signature verification.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="141"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="139"/>
         <source>Error for key with fingerprint </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="154"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="152"/>
         <source>Signed By: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3379,68 +3385,68 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="45"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
         <source>    Sign Mode: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
         <source>Normal</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
         <source>Clear</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="53"/>
         <source>Detach</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="57"/>
         <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>    Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>&lt;unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
         <source>    Public Key Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="62"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="64"/>
         <source>    Hash Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="65"/>
         <source>    Date &amp; Time: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="75"/>
         <source>Invalid Signers: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="77"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
         <source>[&gt;] Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="78"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="80"/>
         <source>      Fingerprint: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="81"/>
         <source>      Reason: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3590,6 +3596,19 @@
     </message>
 </context>
 <context>
+    <name>UnknownSignersChecker</name>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="69"/>
+        <source>Warning</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="70"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
     <name>UpdateTab</name>
     <message>
         <location filename="../../src/ui/help/AboutDialog.cpp" line="129"/>
@@ -3798,22 +3817,22 @@
 <context>
     <name>VerifyResultAnalyse</name>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="33"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="31"/>
         <source>[#] Verify Operation </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="34"/>
         <source>[Success]</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="38"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
         <source>[Failed] </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="166"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="158"/>
         <source>&lt;Unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/resource/ts/gpgfrontend_es.ts b/resource/ts/gpgfrontend_es.ts
index 2b366319..866ccad0 100644
--- a/resource/ts/gpgfrontend_es.ts
+++ b/resource/ts/gpgfrontend_es.ts
@@ -481,100 +481,100 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="56"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="52"/>
         <source>Save Checked Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="59"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="55"/>
         <source>Save checked private keys on exit and restore them on next start.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="68"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="64"/>
         <source>Confirm drag&apos;n&apos;drop key import</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="71"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="67"/>
         <source>Import files dropped on the keylist without confirmation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="78"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="74"/>
         <source>Language</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="87"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="83"/>
         <source>&lt;b&gt;NOTE: &lt;/b&gt; GpgFrontend will restart automatically if you change the language!</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="92"/>
         <source>Own key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="100"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
         <source>Get Service Token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="101"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="230"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="97"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="234"/>
         <source>No Service Token Found</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="107"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="103"/>
         <source>&lt;none&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="124"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="120"/>
         <source>Key pair for synchronization and identity authentication</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="248"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="252"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="249"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="253"/>
         <source>Own Key can not be None while getting service token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="261"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="265"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="336"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="262"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="266"/>
         <source>Key Not Exists</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="337"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="345"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="350"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="346"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="351"/>
         <source>Succeed in getting service token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>There is a problem with the communication with the server</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2041,22 +2041,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="99"/>
         <source>Unsuccessful Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="101"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
         <source>Signature operation failed for UID </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="107"/>
         <source>Operation Complete</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="109"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
         <source>The signature operation of the UID is complete</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2169,8 +2169,8 @@
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="218"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="231"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2205,6 +2205,7 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="150"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="226"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="409"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="375"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2220,8 +2221,8 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="62"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="239"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="422"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="298"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
@@ -2229,15 +2230,15 @@
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="69"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="246"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="51"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="132"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="70"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="247"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2245,15 +2246,15 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="71"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="248"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="436"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="135"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="312"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="91"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="72"/>
         <source>Encrypting</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2269,7 +2270,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="268"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="150"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="151"/>
         <source>Signing</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2290,7 +2291,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="353"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="258"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="259"/>
         <source>Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2339,7 +2340,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="551"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="456"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="461"/>
         <source>Decrypting and Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2402,76 +2403,81 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="102"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="408"/>
         <source>Function Disabled</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="104"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="409"/>
         <source>Please go to the settings interface to enable and configure this function.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
         <source>The selected key contains a key that does not actually have a signature usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Short Crypto Text only supports Decrypt &amp; Verify.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="199"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="200"/>
         <source>Decrypting</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="410"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="376"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="415"/>
         <source>Service Token Empty</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="416"/>
         <source>Please go to the settings interface to set Own Key and get Service Token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Key Not Found.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="560"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="572"/>
         <source>Outdated Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="561"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="573"/>
         <source>This version(%1) is out of date, please update the latest version in time. </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="563"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="575"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="582"/>
         <source>You can download the latest version(%1) on Github Releases Page.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="567"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="579"/>
         <source>Unreleased Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="568"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="580"/>
         <source>This version(%1) has not been officially released and is not recommended for use in a production environment. &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2999,14 +3005,14 @@
 <context>
     <name>PubkeyGetter</name>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="79"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="66"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="90"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="80"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="104"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="67"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="91"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3014,22 +3020,22 @@
 <context>
     <name>PubkeyUploader</name>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="94"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="95"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="95"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="96"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="102"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="103"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="104"/>
         <source>Partial failure of automatic pubkey exchange</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3042,102 +3048,102 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="61"/>
         <source>One or More Bad Signatures.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="66"/>
         <source>A </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="70"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
         <source>Good </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="71"/>
         <source>Bad </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="76"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="74"/>
         <source>Expired </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="77"/>
         <source>Missing Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="82"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="80"/>
         <source>Revoked Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="85"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="83"/>
         <source>Expired Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="88"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="86"/>
         <source>Missing CRL&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="90"/>
         <source>Signature Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="94"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
         <source>Signature NOT Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="102"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="100"/>
         <source>Key is NOT present with ID 0x</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="109"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="107"/>
         <source>A signature could NOT be verified due to a Missing Key
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="113"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="111"/>
         <source>A signature is valid but the key used to verify the signature has been revoked
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="121"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="119"/>
         <source>A signature is valid but expired
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="128"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="126"/>
         <source>A signature is valid but the key used to verify the signature has expired.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="135"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="133"/>
         <source>There was some other error which prevented the signature verification.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="141"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="139"/>
         <source>Error for key with fingerprint </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="154"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="152"/>
         <source>Signed By: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3379,68 +3385,68 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="45"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
         <source>    Sign Mode: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
         <source>Normal</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
         <source>Clear</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="53"/>
         <source>Detach</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="57"/>
         <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>    Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>&lt;unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
         <source>    Public Key Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="62"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="64"/>
         <source>    Hash Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="65"/>
         <source>    Date &amp; Time: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="75"/>
         <source>Invalid Signers: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="77"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
         <source>[&gt;] Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="78"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="80"/>
         <source>      Fingerprint: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="81"/>
         <source>      Reason: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3590,6 +3596,19 @@
     </message>
 </context>
 <context>
+    <name>UnknownSignersChecker</name>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="69"/>
+        <source>Warning</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="70"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
     <name>UpdateTab</name>
     <message>
         <location filename="../../src/ui/help/AboutDialog.cpp" line="129"/>
@@ -3798,22 +3817,22 @@
 <context>
     <name>VerifyResultAnalyse</name>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="33"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="31"/>
         <source>[#] Verify Operation </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="34"/>
         <source>[Success]</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="38"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
         <source>[Failed] </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="166"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="158"/>
         <source>&lt;Unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/resource/ts/gpgfrontend_fr.ts b/resource/ts/gpgfrontend_fr.ts
index 81b7ab11..8522c9be 100644
--- a/resource/ts/gpgfrontend_fr.ts
+++ b/resource/ts/gpgfrontend_fr.ts
@@ -481,100 +481,100 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="56"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="52"/>
         <source>Save Checked Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="59"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="55"/>
         <source>Save checked private keys on exit and restore them on next start.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="68"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="64"/>
         <source>Confirm drag&apos;n&apos;drop key import</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="71"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="67"/>
         <source>Import files dropped on the keylist without confirmation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="78"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="74"/>
         <source>Language</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="87"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="83"/>
         <source>&lt;b&gt;NOTE: &lt;/b&gt; GpgFrontend will restart automatically if you change the language!</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="92"/>
         <source>Own key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="100"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
         <source>Get Service Token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="101"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="230"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="97"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="234"/>
         <source>No Service Token Found</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="107"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="103"/>
         <source>&lt;none&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="124"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="120"/>
         <source>Key pair for synchronization and identity authentication</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="248"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="252"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="249"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="253"/>
         <source>Own Key can not be None while getting service token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="261"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="265"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="336"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="262"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="266"/>
         <source>Key Not Exists</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="337"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="345"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="350"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="346"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="351"/>
         <source>Succeed in getting service token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>There is a problem with the communication with the server</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2041,22 +2041,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="99"/>
         <source>Unsuccessful Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="101"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
         <source>Signature operation failed for UID </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="107"/>
         <source>Operation Complete</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="109"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
         <source>The signature operation of the UID is complete</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2169,8 +2169,8 @@
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="218"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="231"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2205,6 +2205,7 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="150"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="226"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="409"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="375"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2220,8 +2221,8 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="62"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="239"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="422"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="298"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
@@ -2229,15 +2230,15 @@
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="69"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="246"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="51"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="132"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="70"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="247"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2245,15 +2246,15 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="71"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="248"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="436"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="135"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="312"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="91"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="72"/>
         <source>Encrypting</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2269,7 +2270,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="268"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="150"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="151"/>
         <source>Signing</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2290,7 +2291,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="353"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="258"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="259"/>
         <source>Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2339,7 +2340,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="551"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="456"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="461"/>
         <source>Decrypting and Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2402,76 +2403,81 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="102"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="408"/>
         <source>Function Disabled</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="104"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="409"/>
         <source>Please go to the settings interface to enable and configure this function.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
         <source>The selected key contains a key that does not actually have a signature usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Short Crypto Text only supports Decrypt &amp; Verify.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="199"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="200"/>
         <source>Decrypting</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="410"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="376"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="415"/>
         <source>Service Token Empty</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="416"/>
         <source>Please go to the settings interface to set Own Key and get Service Token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Key Not Found.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="560"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="572"/>
         <source>Outdated Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="561"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="573"/>
         <source>This version(%1) is out of date, please update the latest version in time. </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="563"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="575"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="582"/>
         <source>You can download the latest version(%1) on Github Releases Page.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="567"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="579"/>
         <source>Unreleased Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="568"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="580"/>
         <source>This version(%1) has not been officially released and is not recommended for use in a production environment. &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2999,14 +3005,14 @@
 <context>
     <name>PubkeyGetter</name>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="79"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="66"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="90"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="80"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="104"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="67"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="91"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3014,22 +3020,22 @@
 <context>
     <name>PubkeyUploader</name>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="94"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="95"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="95"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="96"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="102"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="103"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="104"/>
         <source>Partial failure of automatic pubkey exchange</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3042,102 +3048,102 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="61"/>
         <source>One or More Bad Signatures.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="66"/>
         <source>A </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="70"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
         <source>Good </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="71"/>
         <source>Bad </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="76"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="74"/>
         <source>Expired </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="77"/>
         <source>Missing Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="82"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="80"/>
         <source>Revoked Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="85"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="83"/>
         <source>Expired Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="88"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="86"/>
         <source>Missing CRL&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="90"/>
         <source>Signature Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="94"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
         <source>Signature NOT Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="102"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="100"/>
         <source>Key is NOT present with ID 0x</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="109"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="107"/>
         <source>A signature could NOT be verified due to a Missing Key
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="113"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="111"/>
         <source>A signature is valid but the key used to verify the signature has been revoked
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="121"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="119"/>
         <source>A signature is valid but expired
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="128"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="126"/>
         <source>A signature is valid but the key used to verify the signature has expired.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="135"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="133"/>
         <source>There was some other error which prevented the signature verification.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="141"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="139"/>
         <source>Error for key with fingerprint </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="154"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="152"/>
         <source>Signed By: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3379,68 +3385,68 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="45"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
         <source>    Sign Mode: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
         <source>Normal</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
         <source>Clear</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="53"/>
         <source>Detach</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="57"/>
         <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>    Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>&lt;unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
         <source>    Public Key Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="62"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="64"/>
         <source>    Hash Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="65"/>
         <source>    Date &amp; Time: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="75"/>
         <source>Invalid Signers: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="77"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
         <source>[&gt;] Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="78"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="80"/>
         <source>      Fingerprint: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="81"/>
         <source>      Reason: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3590,6 +3596,19 @@
     </message>
 </context>
 <context>
+    <name>UnknownSignersChecker</name>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="69"/>
+        <source>Warning</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="70"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
     <name>UpdateTab</name>
     <message>
         <location filename="../../src/ui/help/AboutDialog.cpp" line="129"/>
@@ -3798,22 +3817,22 @@
 <context>
     <name>VerifyResultAnalyse</name>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="33"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="31"/>
         <source>[#] Verify Operation </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="34"/>
         <source>[Success]</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="38"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
         <source>[Failed] </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="166"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="158"/>
         <source>&lt;Unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/resource/ts/gpgfrontend_ru.ts b/resource/ts/gpgfrontend_ru.ts
index dd2c7406..a37303ef 100644
--- a/resource/ts/gpgfrontend_ru.ts
+++ b/resource/ts/gpgfrontend_ru.ts
@@ -481,100 +481,100 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="56"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="52"/>
         <source>Save Checked Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="59"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="55"/>
         <source>Save checked private keys on exit and restore them on next start.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="68"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="64"/>
         <source>Confirm drag&apos;n&apos;drop key import</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="71"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="67"/>
         <source>Import files dropped on the keylist without confirmation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="78"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="74"/>
         <source>Language</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="87"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="83"/>
         <source>&lt;b&gt;NOTE: &lt;/b&gt; GpgFrontend will restart automatically if you change the language!</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="92"/>
         <source>Own key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="100"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
         <source>Get Service Token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="101"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="230"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="97"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="234"/>
         <source>No Service Token Found</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="107"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="103"/>
         <source>&lt;none&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="124"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="120"/>
         <source>Key pair for synchronization and identity authentication</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="248"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="252"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="249"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="253"/>
         <source>Own Key can not be None while getting service token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="261"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="265"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="336"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="262"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="266"/>
         <source>Key Not Exists</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="337"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="345"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="350"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="346"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="351"/>
         <source>Succeed in getting service token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>There is a problem with the communication with the server</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2041,22 +2041,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="99"/>
         <source>Unsuccessful Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="101"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
         <source>Signature operation failed for UID </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="107"/>
         <source>Operation Complete</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="109"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
         <source>The signature operation of the UID is complete</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2169,8 +2169,8 @@
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="218"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="231"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2205,6 +2205,7 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="150"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="226"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="409"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="375"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2220,8 +2221,8 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="62"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="239"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="422"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="298"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
@@ -2229,15 +2230,15 @@
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="69"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="246"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="51"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="132"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="70"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="247"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2245,15 +2246,15 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="71"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="248"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="436"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="135"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="312"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="91"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="72"/>
         <source>Encrypting</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2269,7 +2270,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="268"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="150"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="151"/>
         <source>Signing</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2290,7 +2291,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="353"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="258"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="259"/>
         <source>Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2339,7 +2340,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="551"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="456"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="461"/>
         <source>Decrypting and Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2402,76 +2403,81 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="102"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="408"/>
         <source>Function Disabled</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="104"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="409"/>
         <source>Please go to the settings interface to enable and configure this function.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
         <source>The selected key contains a key that does not actually have a signature usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Short Crypto Text only supports Decrypt &amp; Verify.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="199"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="200"/>
         <source>Decrypting</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="410"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="376"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="415"/>
         <source>Service Token Empty</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="416"/>
         <source>Please go to the settings interface to set Own Key and get Service Token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Key Not Found.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="560"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="572"/>
         <source>Outdated Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="561"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="573"/>
         <source>This version(%1) is out of date, please update the latest version in time. </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="563"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="575"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="582"/>
         <source>You can download the latest version(%1) on Github Releases Page.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="567"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="579"/>
         <source>Unreleased Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="568"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="580"/>
         <source>This version(%1) has not been officially released and is not recommended for use in a production environment. &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2999,14 +3005,14 @@
 <context>
     <name>PubkeyGetter</name>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="79"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="66"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="90"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="80"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="104"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="67"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="91"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3014,22 +3020,22 @@
 <context>
     <name>PubkeyUploader</name>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="94"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="95"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="95"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="96"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="102"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="103"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="104"/>
         <source>Partial failure of automatic pubkey exchange</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3042,102 +3048,102 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="61"/>
         <source>One or More Bad Signatures.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="66"/>
         <source>A </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="70"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
         <source>Good </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="71"/>
         <source>Bad </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="76"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="74"/>
         <source>Expired </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="77"/>
         <source>Missing Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="82"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="80"/>
         <source>Revoked Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="85"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="83"/>
         <source>Expired Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="88"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="86"/>
         <source>Missing CRL&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="90"/>
         <source>Signature Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="94"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
         <source>Signature NOT Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="102"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="100"/>
         <source>Key is NOT present with ID 0x</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="109"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="107"/>
         <source>A signature could NOT be verified due to a Missing Key
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="113"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="111"/>
         <source>A signature is valid but the key used to verify the signature has been revoked
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="121"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="119"/>
         <source>A signature is valid but expired
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="128"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="126"/>
         <source>A signature is valid but the key used to verify the signature has expired.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="135"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="133"/>
         <source>There was some other error which prevented the signature verification.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="141"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="139"/>
         <source>Error for key with fingerprint </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="154"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="152"/>
         <source>Signed By: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3379,68 +3385,68 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="45"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
         <source>    Sign Mode: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
         <source>Normal</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
         <source>Clear</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="53"/>
         <source>Detach</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="57"/>
         <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>    Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>&lt;unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
         <source>    Public Key Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="62"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="64"/>
         <source>    Hash Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="65"/>
         <source>    Date &amp; Time: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="75"/>
         <source>Invalid Signers: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="77"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
         <source>[&gt;] Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="78"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="80"/>
         <source>      Fingerprint: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="81"/>
         <source>      Reason: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3590,6 +3596,19 @@
     </message>
 </context>
 <context>
+    <name>UnknownSignersChecker</name>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="69"/>
+        <source>Warning</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="70"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
     <name>UpdateTab</name>
     <message>
         <location filename="../../src/ui/help/AboutDialog.cpp" line="129"/>
@@ -3798,22 +3817,22 @@
 <context>
     <name>VerifyResultAnalyse</name>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="33"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="31"/>
         <source>[#] Verify Operation </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="34"/>
         <source>[Success]</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="38"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
         <source>[Failed] </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="166"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="158"/>
         <source>&lt;Unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/resource/ts/gpgfrontend_zh_cn.ts b/resource/ts/gpgfrontend_zh_cn.ts
index a81b6e2b..61728942 100644
--- a/resource/ts/gpgfrontend_zh_cn.ts
+++ b/resource/ts/gpgfrontend_zh_cn.ts
@@ -481,100 +481,100 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="56"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="52"/>
         <source>Save Checked Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="59"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="55"/>
         <source>Save checked private keys on exit and restore them on next start.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="68"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="64"/>
         <source>Confirm drag&apos;n&apos;drop key import</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="71"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="67"/>
         <source>Import files dropped on the keylist without confirmation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="78"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="74"/>
         <source>Language</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="87"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="83"/>
         <source>&lt;b&gt;NOTE: &lt;/b&gt; GpgFrontend will restart automatically if you change the language!</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="92"/>
         <source>Own key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="100"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="96"/>
         <source>Get Service Token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="101"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="230"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="97"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="234"/>
         <source>No Service Token Found</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="107"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="103"/>
         <source>&lt;none&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="124"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="120"/>
         <source>Key pair for synchronization and identity authentication</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="248"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="252"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="249"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="253"/>
         <source>Own Key can not be None while getting service token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="261"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="265"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="336"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="262"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="266"/>
         <source>Key Not Exists</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="332"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="337"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="345"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="350"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="346"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="351"/>
         <source>Succeed in getting service token</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="348"/>
+        <location filename="../../src/ui/settings/SettingsGeneral.cpp" line="353"/>
         <source>There is a problem with the communication with the server</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2041,22 +2041,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="99"/>
         <source>Unsuccessful Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="101"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="100"/>
         <source>Signature operation failed for UID </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="107"/>
         <source>Operation Complete</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="109"/>
+        <location filename="../../src/ui/keypair_details/KeyUIDSignDialog.cpp" line="108"/>
         <source>The signature operation of the UID is complete</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2169,8 +2169,8 @@
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="218"/>
         <location filename="../../src/ui/main_window/MainWindowServerSlotFunction.cpp" line="231"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2205,6 +2205,7 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="150"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="226"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="409"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="375"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2220,8 +2221,8 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="62"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="239"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="422"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="126"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="298"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
@@ -2229,15 +2230,15 @@
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="69"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="246"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="51"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="132"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="70"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="247"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="52"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2245,15 +2246,15 @@
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="71"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="248"/>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="436"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="53"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="135"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="312"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="91"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="72"/>
         <source>Encrypting</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2269,7 +2270,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="268"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="150"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="151"/>
         <source>Signing</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2290,7 +2291,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="353"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="258"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="259"/>
         <source>Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2339,7 +2340,7 @@
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowFileSlotFunction.cpp" line="551"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="456"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="461"/>
         <source>Decrypting and Verifying</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2402,76 +2403,81 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="102"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="408"/>
         <source>Function Disabled</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="103"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="104"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="409"/>
         <source>Please go to the settings interface to enable and configure this function.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="134"/>
         <source>The selected key contains a key that does not actually have a signature usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Notice</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="185"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="186"/>
         <source>Short Crypto Text only supports Decrypt &amp; Verify.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="199"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="200"/>
         <source>Decrypting</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="410"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="376"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="415"/>
         <source>Service Token Empty</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="416"/>
         <source>Please go to the settings interface to set Own Key and get Service Token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="513"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="529"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="541"/>
         <source>Key Not Found.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="560"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="572"/>
         <source>Outdated Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="561"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="573"/>
         <source>This version(%1) is out of date, please update the latest version in time. </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="563"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="575"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="582"/>
         <source>You can download the latest version(%1) on Github Releases Page.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="567"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="579"/>
         <source>Unreleased Version</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="568"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="580"/>
         <source>This version(%1) has not been officially released and is not recommended for use in a production environment. &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -2999,14 +3005,14 @@
 <context>
     <name>PubkeyGetter</name>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="79"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="66"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="90"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="80"/>
-        <location filename="../../src/server/PubkeyGetter.cpp" line="104"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="67"/>
+        <location filename="../../src/server/api/PubkeyGetter.cpp" line="91"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3014,22 +3020,22 @@
 <context>
     <name>PubkeyUploader</name>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="94"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="95"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="95"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="96"/>
         <source>The communication content with the server does not meet the requirements</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="102"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="103"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/server/PubkeyUploader.cpp" line="103"/>
+        <location filename="../../src/server/api/PubkeyUploader.cpp" line="104"/>
         <source>Partial failure of automatic pubkey exchange</source>
         <translation type="unfinished"></translation>
     </message>
@@ -3042,102 +3048,102 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="61"/>
         <source>One or More Bad Signatures.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="66"/>
         <source>A </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="70"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="68"/>
         <source>Good </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="71"/>
         <source>Bad </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="76"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="74"/>
         <source>Expired </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="77"/>
         <source>Missing Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="82"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="80"/>
         <source>Revoked Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="85"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="83"/>
         <source>Expired Key&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="88"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="86"/>
         <source>Missing CRL&apos;s </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="90"/>
         <source>Signature Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="94"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="92"/>
         <source>Signature NOT Fully Valid.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="102"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="100"/>
         <source>Key is NOT present with ID 0x</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="109"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="107"/>
         <source>A signature could NOT be verified due to a Missing Key
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="113"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="111"/>
         <source>A signature is valid but the key used to verify the signature has been revoked
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="121"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="119"/>
         <source>A signature is valid but expired
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="128"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="126"/>
         <source>A signature is valid but the key used to verify the signature has expired.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="135"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="133"/>
         <source>There was some other error which prevented the signature verification.
 </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="141"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="139"/>
         <source>Error for key with fingerprint </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="154"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="152"/>
         <source>Signed By: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3379,68 +3385,68 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="45"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
         <source>    Sign Mode: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="47"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
         <source>Normal</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="49"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
         <source>Clear</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="51"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="53"/>
         <source>Detach</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="57"/>
         <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>    Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="59"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
         <source>&lt;unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="61"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
         <source>    Public Key Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="62"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="64"/>
         <source>    Hash Algo: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="63"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="65"/>
         <source>    Date &amp; Time: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="73"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="75"/>
         <source>Invalid Signers: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="77"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
         <source>[&gt;] Signer: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="78"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="80"/>
         <source>      Fingerprint: </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="79"/>
+        <location filename="../../src/gpg/result_analyse/SignResultAnalyse.cpp" line="81"/>
         <source>      Reason: </source>
         <translation type="unfinished"></translation>
     </message>
@@ -3590,6 +3596,19 @@
     </message>
 </context>
 <context>
+    <name>UnknownSignersChecker</name>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="69"/>
+        <source>Warning</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/advance/UnknownSignersChecker.cpp" line="70"/>
+        <source>Automatic public key exchange failed.</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
     <name>UpdateTab</name>
     <message>
         <location filename="../../src/ui/help/AboutDialog.cpp" line="129"/>
@@ -3798,22 +3817,22 @@
 <context>
     <name>VerifyResultAnalyse</name>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="33"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="31"/>
         <source>[#] Verify Operation </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="34"/>
         <source>[Success]</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="38"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="36"/>
         <source>[Failed] </source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="166"/>
+        <location filename="../../src/gpg/result_analyse/VerifyResultAnalyse.cpp" line="158"/>
         <source>&lt;Unknown&gt;</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/src/advance/UnknownSignersChecker.cpp b/src/advance/UnknownSignersChecker.cpp
index 30f9341f..69897e31 100644
--- a/src/advance/UnknownSignersChecker.cpp
+++ b/src/advance/UnknownSignersChecker.cpp
@@ -23,7 +23,6 @@
  */
 
 #include "advance/UnknownSignersChecker.h"
-#include "server/api/PubkeyGetter.h"
 
 
 UnknownSignersChecker::UnknownSignersChecker(GpgME::GpgContext *ctx, gpgme_verify_result_t result) :
@@ -47,7 +46,7 @@ void UnknownSignersChecker::start() {
                     check_signer(sign);
                 break;
             case GPG_ERR_NO_PUBKEY:
-                break;
+
             case GPG_ERR_CERT_REVOKED:
             case GPG_ERR_SIG_EXPIRED:
             case GPG_ERR_KEY_EXPIRED:
@@ -62,20 +61,19 @@ void UnknownSignersChecker::start() {
         sign = sign->next;
     }
 
-    auto pubkeyGetter = PubkeyGetter(mCtx, unknownFprs);
-    pubkeyGetter.start();
-    if (!pubkeyGetter.result()) {
-        QMessageBox::warning(nullptr,
-                             tr("Warning"),
-                             tr("Automatic public key exchange failed."));
+    if(!unknownFprs.isEmpty()) {
+        auto pubkeyGetter = PubkeyGetter(mCtx, unknownFprs);
+        pubkeyGetter.start();
+        if (!pubkeyGetter.result()) {
+
+        }
     }
 }
 
 void UnknownSignersChecker::check_signer(gpgme_signature_t sign) {
 
     auto key = mCtx->getKeyByFpr(sign->fpr);
-
-    if (settings.value("advanced/autoPubkeyExchange").toBool() && !key.good) {
+    if (!key.good) {
         qDebug() << "Find Unknown FingerPrint " << sign->fpr;
         unknownFprs.append(sign->fpr);
     }
diff --git a/src/gpg/gpg_context/GpgContext.cpp b/src/gpg/gpg_context/GpgContext.cpp
index f7bbbe37..8b12b302 100644
--- a/src/gpg/gpg_context/GpgContext.cpp
+++ b/src/gpg/gpg_context/GpgContext.cpp
@@ -260,11 +260,12 @@ namespace GpgME {
         auto *gpgProcess = new QProcess(&looper);
         gpgProcess->setProcessChannelMode(QProcess::MergedChannels);
         connect(gpgProcess, qOverload<int, QProcess::ExitStatus>(&QProcess::finished), &looper, &QEventLoop::quit);
-        connect(gpgProcess, qOverload<int, QProcess::ExitStatus>(&QProcess::finished), dialog, &WaitingDialog::deleteLater);
+        connect(gpgProcess, qOverload<int, QProcess::ExitStatus>(&QProcess::finished), dialog,
+                &WaitingDialog::deleteLater);
         connect(gpgProcess, &QProcess::errorOccurred, []() -> void { qDebug("Error in Process"); });
         connect(gpgProcess, &QProcess::errorOccurred, &looper, &QEventLoop::quit);
         connect(gpgProcess, &QProcess::started, []() -> void { qDebug() << "Gpg Process Started Success"; });
-        connect(gpgProcess, &QProcess::readyReadStandardOutput,  [interactFunc, gpgProcess]() {
+        connect(gpgProcess, &QProcess::readyReadStandardOutput, [interactFunc, gpgProcess]() {
             qDebug() << "Function Called";
             interactFunc(gpgProcess);
         });
@@ -330,11 +331,11 @@ namespace GpgME {
         return mKeyList;
     }
 
-    void GpgContext::getSigners(QVector<GpgKey> &signer) {
-        auto count = gpgme_signers_count(mCtx);
+    void GpgContext::getSigners(QVector<GpgKey> &signer, gpgme_ctx_t ctx) {
+        auto count = gpgme_signers_count(ctx);
         signer.clear();
         for (auto i = 0; i < count; i++) {
-            auto key = gpgme_signers_enum(mCtx, i);
+            auto key = gpgme_signers_enum(ctx, i);
             auto it = mKeyMap.find(key->subkeys->keyid);
             if (it == mKeyMap.end()) {
                 qDebug() << "Inconsistent state";
@@ -345,15 +346,15 @@ namespace GpgME {
         }
     }
 
-    void GpgContext::setSigners(const QVector<GpgKey> &keys) {
-        gpgme_signers_clear(mCtx);
+    void GpgContext::setSigners(const QVector<GpgKey> &keys, gpgme_ctx_t ctx) {
+        gpgme_signers_clear(ctx);
         for (const auto &key : keys) {
             if (checkIfKeyCanSign(key)) {
-                auto gpgmeError = gpgme_signers_add(mCtx, key.key_refer);
+                auto gpgmeError = gpgme_signers_add(ctx, key.key_refer);
                 checkErr(gpgmeError);
             }
         }
-        if (keys.length() != gpgme_signers_count(mCtx)) {
+        if (keys.length() != gpgme_signers_count(ctx)) {
             qDebug() << "No All Keys Added";
         }
     }
@@ -397,4 +398,15 @@ namespace GpgME {
         }
     }
 
+    gpgme_ctx_t GpgME::GpgContext::create_ctx() {
+        gpgme_ctx_t ctx;
+        err = gpgme_new(&ctx);
+        checkErr(err);
+
+        gpgme_set_armor(ctx, 1);
+        gpgme_set_passphrase_cb(ctx, passphraseCb, this);
+        return ctx;
+    }
+
+
 }
diff --git a/src/gpg/gpg_context/GpgContextBasicOpera.cpp b/src/gpg/gpg_context/GpgContextBasicOpera.cpp
index f368a6b4..8872acfe 100644
--- a/src/gpg/gpg_context/GpgContextBasicOpera.cpp
+++ b/src/gpg/gpg_context/GpgContextBasicOpera.cpp
@@ -166,7 +166,7 @@ gpg_error_t GpgME::GpgContext::sign(const QVector<GpgKey> &keys, const QByteArra
     }
 
     // Set Singers of this opera
-    setSigners(keys);
+    setSigners(keys, mCtx);
 
     gpgmeError = gpgme_data_new_from_mem(&dataIn, inBuffer.data(), inBuffer.size(), 1);
     checkErr(gpgmeError);
@@ -228,7 +228,7 @@ GpgME::GpgContext::encryptSign(QVector<GpgKey> &keys, QVector<GpgKey> &signers,
     gpgme_data_t data_in = nullptr, data_out = nullptr;
     outBuffer->resize(0);
 
-    setSigners(signers);
+    setSigners(signers, mCtx);
 
     //gpgme_encrypt_result_t e_result;
     gpgme_key_t recipients[keys.count() + 1];
diff --git a/src/gpg/gpg_context/GpgContextKeyOpera.cpp b/src/gpg/gpg_context/GpgContextKeyOpera.cpp
index 5ead0629..4fa2e8c5 100644
--- a/src/gpg/gpg_context/GpgContextKeyOpera.cpp
+++ b/src/gpg/gpg_context/GpgContextKeyOpera.cpp
@@ -115,19 +115,29 @@ bool GpgME::GpgContext::exportKeys(QStringList *uidList, QByteArray *outBuffer)
         return false;
     }
 
+    // Alleviate another crash problem caused by an unknown array out-of-bounds access
+    gpgme_ctx_t ctx = create_ctx();
+
     for (int i = 0; i < uidList->count(); i++) {
         err = gpgme_data_new(&dataOut);
         checkErr(err);
 
-        err = gpgme_op_export(mCtx, uidList->at(i).toUtf8().constData(), 0, dataOut);
+        err = gpgme_op_export(ctx, uidList->at(i).toUtf8().constData(), 0, dataOut);
         checkErr(err);
 
         read_bytes = gpgme_data_seek(dataOut, 0, SEEK_END);
 
+        qDebug() << "exportKeys read_bytes" << read_bytes;
+
         err = readToBuffer(dataOut, outBuffer);
         checkErr(err);
         gpgme_data_release(dataOut);
     }
+
+    qDebug() << "outBuffer" << *outBuffer;
+
+    gpgme_release(ctx);
+
     return true;
 }
 
@@ -188,19 +198,13 @@ void GpgME::GpgContext::fetch_keys() {
         return;
     }
 
-    qDebug() << "Operate KeyList End";
-
     gpgmeError = gpgme_op_keylist_end(mCtx);
     if (gpg_err_code(gpgmeError) != GPG_ERR_NO_ERROR) {
         checkErr(gpgmeError);
         return;
     }
 
-    gpgmeError = gpgme_op_keylist_end(mCtx);
-    if (gpg_err_code(gpgmeError) != GPG_ERR_NO_ERROR) {
-        checkErr(gpgmeError);
-        return;
-    }
+    qDebug() << "Operate KeyList End";
 
     mKeyList = keys;
 }
@@ -343,7 +347,10 @@ bool GpgME::GpgContext::exportSecretKey(const GpgKey &key, QByteArray *outBuffer
  * @param expires expire date and time of the signature
  * @return if successful
  */
-bool GpgME::GpgContext::signKey(const GpgKey &target, const QString &uid, const QDateTime *expires) {
+bool GpgME::GpgContext::signKey(const GpgKey &target, const QVector<GpgKey> &keys, const QString &uid,
+                                const QDateTime *expires) {
+
+    setSigners(keys, mCtx);
 
     unsigned int flags = 0;
 
diff --git a/src/gpg/result_analyse/EncryptResultAnalyse.cpp b/src/gpg/result_analyse/EncryptResultAnalyse.cpp
index 55f2cb9f..1ba685c9 100644
--- a/src/gpg/result_analyse/EncryptResultAnalyse.cpp
+++ b/src/gpg/result_analyse/EncryptResultAnalyse.cpp
@@ -26,6 +26,8 @@
 
 EncryptResultAnalyse::EncryptResultAnalyse(gpgme_error_t error, gpgme_encrypt_result_t result) {
 
+    qDebug() << "Start Encrypt Result Analyse";
+
     stream << "[#] Encrypt Operation ";
 
     if(gpgme_err_code(error) == GPG_ERR_NO_ERROR)
diff --git a/src/gpg/result_analyse/SignResultAnalyse.cpp b/src/gpg/result_analyse/SignResultAnalyse.cpp
index d50017c0..bac16021 100644
--- a/src/gpg/result_analyse/SignResultAnalyse.cpp
+++ b/src/gpg/result_analyse/SignResultAnalyse.cpp
@@ -26,6 +26,8 @@
 
 SignResultAnalyse::SignResultAnalyse(GpgME::GpgContext *ctx, gpgme_error_t error, gpgme_sign_result_t result) {
 
+    qDebug() << "Start Sign Result Analyse";
+
     stream << tr("[#] Sign Operation ");
 
     if (gpgme_err_code(error) == GPG_ERR_NO_ERROR)
@@ -42,6 +44,8 @@ SignResultAnalyse::SignResultAnalyse(GpgME::GpgContext *ctx, gpgme_error_t error
         while (new_sign != nullptr) {
             stream << tr("[>] New Signature: ") << Qt::endl;
 
+            qDebug() << "Signers Fingerprint: " << new_sign->fpr;
+
             stream << tr("    Sign Mode: ");
             if (new_sign->type == GPGME_SIG_MODE_NORMAL)
                 stream << tr("Normal");
diff --git a/src/gpg/result_analyse/VerifyResultAnalyse.cpp b/src/gpg/result_analyse/VerifyResultAnalyse.cpp
index 816e889c..75e07d33 100644
--- a/src/gpg/result_analyse/VerifyResultAnalyse.cpp
+++ b/src/gpg/result_analyse/VerifyResultAnalyse.cpp
@@ -28,6 +28,8 @@
 VerifyResultAnalyse::VerifyResultAnalyse(GpgME::GpgContext *ctx, gpgme_error_t error, gpgme_verify_result_t result)
         : mCtx(ctx) {
 
+    qDebug() << "Verify Result Analyse Started";
+
     stream << tr("[#] Verify Operation ");
 
     if (gpgme_err_code(error) == GPG_ERR_NO_ERROR)
@@ -89,13 +91,11 @@ VerifyResultAnalyse::VerifyResultAnalyse(GpgME::GpgContext *ctx, gpgme_error_t e
                     if (sign->summary & GPGME_SIGSUM_VALID) {
                         stream << QApplication::tr("Signature Fully Valid.") << Qt::endl;
                     } else {
-                        stream << QApplication::tr("Signature NOT Fully Valid.") << Qt::endl;
+                        stream << QApplication::tr("Signature Not Fully Valid.") << Qt::endl;
                     }
 
                     if (!(sign->status & GPGME_SIGSUM_KEY_MISSING)) {
-                        if (!printSigner(stream, sign)) {
-                            setStatus(0);
-                        }
+                        if (!printSigner(stream, sign)) setStatus(0);
                     } else {
                         stream << QApplication::tr("Key is NOT present with ID 0x") << QString(sign->fpr) << Qt::endl;
                     }
@@ -149,20 +149,20 @@ VerifyResultAnalyse::VerifyResultAnalyse(GpgME::GpgContext *ctx, gpgme_error_t e
 
 bool VerifyResultAnalyse::printSigner(QTextStream &stream, gpgme_signature_t sign) {
     bool keyFound = true;
-    stream << QApplication::tr("Signed By: ");
     auto key = mCtx->getKeyByFpr(sign->fpr);
 
     key = mCtx->getKeyByFpr(sign->fpr);
 
     if (!key.good) {
-        stream << tr("<Unknown>");
+        stream << tr("    Signed By: ") << tr("<unknown>") << Qt::endl;
         setStatus(0);
         keyFound = false;
+    } else {
+        stream << tr("    Signed By: ") << key.uids.first().uid << Qt::endl;
     }
-    stream << key.name;
-    if (!key.email.isEmpty()) {
-        stream << "<" << key.email << ">";
-    }
+    stream << tr("    Public Key Algo: ") << gpgme_pubkey_algo_name(sign->pubkey_algo) << Qt::endl;
+    stream << tr("    Hash Algo: ") << gpgme_hash_algo_name(sign->hash_algo) << Qt::endl;
+    stream << tr("    Date & Time: ") << QDateTime::fromTime_t(sign->timestamp).toString() << Qt::endl;
     stream << Qt::endl;
     return keyFound;
 }
\ No newline at end of file
diff --git a/src/server/ComUtils.cpp b/src/server/ComUtils.cpp
index bd4072f1..6fce493f 100644
--- a/src/server/ComUtils.cpp
+++ b/src/server/ComUtils.cpp
@@ -160,7 +160,16 @@ QByteArray ComUtils::getSignStringBase64(GpgME::GpgContext *ctx, const QString &
     QVector<GpgKey> keys{key};
     QByteArray outSignText;
     auto signData = str.toUtf8();
-    ctx->sign(keys, signData, &outSignText, GPGME_SIG_MODE_NORMAL);
+
+    // The use of multi-threading brings an improvement in UI smoothness
+    gpgme_error_t error;
+    auto thread = QThread::create([&]() {
+        error = ctx->sign(keys, signData, &outSignText, GPGME_SIG_MODE_NORMAL);
+    });
+    thread->start();
+    while (thread->isRunning()) QApplication::processEvents();
+    thread->deleteLater();
+
     return outSignText.toBase64();
 }
 
diff --git a/src/server/api/PubkeyUploader.cpp b/src/server/api/PubkeyUploader.cpp
index 8051dab7..e1c62aeb 100644
--- a/src/server/api/PubkeyUploader.cpp
+++ b/src/server/api/PubkeyUploader.cpp
@@ -32,37 +32,49 @@ PubkeyUploader::PubkeyUploader(GpgME::GpgContext *ctx, const QVector<GpgKey> &ke
 void PubkeyUploader::construct_json() {
     document.SetArray();
     QStringList keyIds;
+    QCryptographicHash shaGen(QCryptographicHash::Sha256);
 
-    rapidjson::Document::AllocatorType &allocator = document.GetAllocator();
+    auto &allocator = document.GetAllocator();
 
+    QVector<QByteArray> keysData;
     for (const auto &key : mKeys) {
-        rapidjson::Value publicKeyObj, pubkey, sha, signedFpr;
-
         QByteArray keyDataBuf;
         keyIds << key.id;
-        mCtx->exportKeys(&keyIds, &keyDataBuf);
 
-        QCryptographicHash shaGen(QCryptographicHash::Sha256);
-        shaGen.addData(keyDataBuf);
+        // The use of multi-threading brings an improvement in UI smoothness
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = mCtx->exportKeys(&keyIds, &keyDataBuf);
+        });
+        thread->start();
+        while (thread->isRunning()) QApplication::processEvents();
+        thread->deleteLater();
+        keysData.push_back(keyDataBuf);
+        keyIds.clear();
+    }
 
+    int index = 0;
+    for (const auto &keyData : keysData) {
+        rapidjson::Value publicKeyObj, pubkey, sha, signedFpr;
+
+        shaGen.addData(keyData);
         auto shaStr = shaGen.result().toHex();
+        shaGen.reset();
 
-        auto signFprStr = ComUtils::getSignStringBase64(mCtx, key.fpr, key);
+        auto signFprStr = ComUtils::getSignStringBase64(mCtx, mKeys[index].fpr, mKeys[index]);
         qDebug() << "signFprStr" << signFprStr;
 
-        pubkey.SetString(keyDataBuf.constData(), keyDataBuf.count());
-
-        sha.SetString(shaStr.constData(), shaStr.count());
-        signedFpr.SetString(signFprStr.constData(), signFprStr.count());
+        pubkey.SetString(keyData.data(), keyData.count(), allocator);
+        sha.SetString(shaStr.data(), shaStr.count(), allocator);
+        signedFpr.SetString(signFprStr.data(), signFprStr.count(), allocator);
 
         publicKeyObj.SetObject();
-
         publicKeyObj.AddMember("publicKey", pubkey, allocator);
         publicKeyObj.AddMember("sha", sha, allocator);
         publicKeyObj.AddMember("signedFpr", signedFpr, allocator);
 
         document.PushBack(publicKeyObj, allocator);
-        keyIds.clear();
+        index++;
     }
 }
 
diff --git a/src/ui/keypair_details/KeyUIDSignDialog.cpp b/src/ui/keypair_details/KeyUIDSignDialog.cpp
index f112ea25..9232cfce 100644
--- a/src/ui/keypair_details/KeyUIDSignDialog.cpp
+++ b/src/ui/keypair_details/KeyUIDSignDialog.cpp
@@ -89,13 +89,12 @@ void KeyUIDSignDialog::slotSignKey(bool clicked) {
     // Set Signers
     QVector<GpgKey> keys;
     mKeyList->getCheckedKeys(keys);
-    mCtx->setSigners(keys);
 
     const auto expires = expiresEdit->dateTime();
 
     for(const auto &uid : mUids) {
         // Sign For mKey
-        if (!mCtx->signKey(mKey, uid.uid, &expires)) {
+        if (!mCtx->signKey(mKey, keys, uid.uid, &expires)) {
             QMessageBox::critical(nullptr,
                                   tr("Unsuccessful Operation"),
                                   QString(tr("Signature operation failed for UID ") + "%1")
diff --git a/src/ui/main_window/MainWindowSlotFunction.cpp b/src/ui/main_window/MainWindowSlotFunction.cpp
index 3d1d6f77..7c740595 100644
--- a/src/ui/main_window/MainWindowSlotFunction.cpp
+++ b/src/ui/main_window/MainWindowSlotFunction.cpp
@@ -287,7 +287,6 @@ void MainWindow::slotVerify() {
 
 void MainWindow::slotEncryptSign() {
 
-
     if (edit->tabCount() == 0) return;
 
     if (edit->slotCurPageTextEdit() != nullptr) {
@@ -372,9 +371,7 @@ void MainWindow::slotEncryptSign() {
             auto pubkeyUploader = PubkeyUploader(mCtx, signerKeys);
             pubkeyUploader.start();
             if(!pubkeyUploader.result()) {
-                QMessageBox::warning(nullptr,
-                                     tr("Warning"),
-                                     tr("Automatic public key exchange failed."));
+
             }
         }
 
@@ -385,6 +382,8 @@ void MainWindow::slotEncryptSign() {
             edit->slotFillTextEditWithText(*tmp2);
         }
 
+        qDebug() << "Start Analyse Result";
+
         auto resultAnalyseEncr = new EncryptResultAnalyse(error, encr_result);
         auto resultAnalyseSign = new SignResultAnalyse(mCtx, error, sign_result);
         int status = std::min(resultAnalyseEncr->getStatus(), resultAnalyseSign->getStatus());
@@ -452,6 +451,21 @@ void MainWindow::slotDecryptVerify() {
         gpgme_decrypt_result_t d_result = nullptr;
         gpgme_verify_result_t v_result = nullptr;
 
+        auto *dialog = new WaitingDialog(tr("Decrypting and Verifying"), this);
+
+        // Automatically import public keys that are not stored locally
+        if(settings.value("advanced/autoPubkeyExchange").toBool()) {
+            gpgme_verify_result_t tmp_v_result = nullptr;
+            auto thread = QThread::create([&]() {
+                mCtx->verify(&text, nullptr, &tmp_v_result);
+            });
+            thread->start();
+            while (thread->isRunning()) QApplication::processEvents();
+            auto* checker = new UnknownSignersChecker(mCtx, tmp_v_result);
+            checker->start();
+            checker->deleteLater();
+        }
+
         gpgme_error_t error;
         auto thread = QThread::create([&]() {
             error = mCtx->decryptVerify(text, decrypted, &d_result, &v_result);
@@ -459,20 +473,14 @@ void MainWindow::slotDecryptVerify() {
         connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
         thread->start();
 
-        auto *dialog = new WaitingDialog(tr("Decrypting and Verifying"), this);
         while (thread->isRunning()) {
             QApplication::processEvents();
         }
 
-        // Automatically import public keys that are not stored locally
-        if(settings.value("advanced/autoPubkeyExchange").toBool()) {
-            auto* checker = new UnknownSignersChecker(mCtx, v_result);
-            checker->start();
-            checker->deleteLater();
-        }
-
         dialog->close();
 
+        qDebug() << "Start Analyse Result";
+
         infoBoard->associateTextEdit(edit->curTextPage());
 
         if (gpgme_err_code(error) == GPG_ERR_NO_ERROR)
@@ -498,6 +506,9 @@ void MainWindow::slotDecryptVerify() {
         }
         delete resultAnalyseDecrypt;
         delete resultAnalyseVerify;
+
+        qDebug() << "End Analyse Result";
+
     } else if (edit->slotCurPageFileTreeView() != nullptr) {
         this->slotFileDecryptVerify();
     }
diff --git a/src/ui/settings/SettingsGeneral.cpp b/src/ui/settings/SettingsGeneral.cpp
index 0e9d9de7..b4372506 100644
--- a/src/ui/settings/SettingsGeneral.cpp
+++ b/src/ui/settings/SettingsGeneral.cpp
@@ -43,10 +43,6 @@ GeneralTab::GeneralTab(GpgME::GpgContext *ctx, QWidget *parent)
     serverBoxLayout->addWidget(serverSelectBox);
     serverBoxLayout->addWidget(new QLabel(
             tr("Server that provides short key and key exchange services")));
-    connect(serverSelectBox, QOverload<const QString &>::of(&QComboBox::currentTextChanged),
-            this, [&](const QString &current) -> void {
-                settings.setValue("general/currentGpgfrontendServer", current);
-            });
 
     serverBox->setLayout(serverBoxLayout);
 
@@ -161,9 +157,16 @@ void GeneralTab::setSettings() {
     }
     for (const auto &s : serverList)
         serverSelectBox->addItem(s);
+
+    qDebug() << "currentGpgfrontendServer" << settings.value("general/currentGpgfrontendServer").toString();
     serverSelectBox->setCurrentText(settings.value("general/currentGpgfrontendServer",
                                                    "service.gpgfrontend.pub").toString());
 
+    connect(serverSelectBox, QOverload<const QString &>::of(&QComboBox::currentTextChanged),
+            this, [&](const QString &current) -> void {
+        settings.setValue("general/currentGpgfrontendServer", current);
+    });
+
     // Language setting
     QString langKey = settings.value("int/lang").toString();
     QString langValue = lang.value(langKey);
@@ -201,6 +204,7 @@ void GeneralTab::applySettings() {
     settings.setValue("keys/saveKeyChecked",
                       saveCheckedKeysCheckBox->isChecked());
 
+    qDebug() << "serverSelectBox currentText" << serverSelectBox->currentText();
     settings.setValue("general/currentGpgfrontendServer",
                       serverSelectBox->currentText());