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<h3><em>Step 3.d</em> Send a test signed email to a friend</h3>
- <p>Write a new email in your email program, addressed to a friend. If you want, tell them about this guide!</p>
- <p>Before sending the email, click the icon of the pencil in the bottom right of the composition window (it should turn yellow). This tells Enigmail to sign the email with you private key.</p>
- <p>After you click send, Enigmail will ask you for your password. It will do this any time it needs to use your public key.</p>
+ <p>GnuPG includes a way for you to sign messages and files, verifying that they came from you and that they weren't tampered with along the way. As a safety feature, GNU/Linux computers often use GnuPG signatures to verify that new software wasn't tampered with before it's installed. These signatures are stronger than their pen-and-paper cousins -- they're impossible to forge, because they're impossible to create without your private key (another reason to keep your private key safe).</p>
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+ <p>You can sign messages to anyone (including people who haven't created their own keypair!) so it's a great way to promote GnuPG. To sign an email to a friend, click the pencil icon next to the lock icon so that it turns gold.If you sign a message, Enigmail will ask you for your password before it sends the message off. I will do this every time it needs to use your private key.</p>
+
+ <p>When the pencil is gold but the lock is grey, the email will be signed but not encrypted. When the pencil is grey and the lock is gold, the email will be encrypted but not signed. When they're both gold, the email will be signed and encrypted.</p>
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