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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="de" lang="de">
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<title>gpg4usb - Documentation</title>
<link rel="stylesheet" type="text/css" href="css/style.css" media="screen" />
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Previous: <a href="docu_decrypt.html">Decrypt a message</a> | <a href="docu.html">Main</a> | Next: <a href="docu_verify.html">Verify a message</a>
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<h1>Howto sign a message</h1>
<p><b>NOTE:</b> You can only sign messages, if you have one private key, the file is encrypted for. You can identify the private keys by the "bunch of keys"-image in front of the name in the keylist (in this case Bobby):</p>
<p>
<IMG SRC="img/docu/private_key_note.jpg" alt="private key hint"/>
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<p>
There are three four for encrypting a text. We assume, that Bobby wants to sign a message.
After this everyone who has his public key can verify the message and ensure, that the message wasn't modified.
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<h4>STEP 1/2: Write the message and check key</h4>
<p>
First Bobby writes the message to the textedit-field. Then he checks his private key in the keylist.
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<p>
<IMG SRC="img/docu/sign_choose_key.jpg" alt="choose the key"/>
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<h4>STEP 3: Click sign button</h4>
<p>
Then Bobby clicks the sign button.
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<p>
<IMG SRC="img/docu/sign_click_verify.jpg" alt="click verify"/>
</p>
<h4>STEP 4: Enter passphrase</h4>
<p>
Now Bobby enters the passphrase of his private key.<br/>
<b>NOTE:</b> You can only sign messages, if you have a private key. The private keys are those, with the key-icon in front of the Name in the keylist.
</p>
<p>
<IMG SRC="img/docu/sign_enter_passphrase.jpg" alt="enter passphrase"/>
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<p>
Afterwards the signed message is shown.
</p>
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Previous: <a href="docu_decrypt.html">Decrypt a message</a> | <a href="docu.html">Main</a> | Next: <a href="docu_verify.html">Verify a message</a>
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