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-<!DOCTYPE article PUBLIC "-//GNOME//DTD DocBook PNG Variant V1.1//EN"[]>
-
-<article>
-
- <sect1 id="encryption-intro">
- <title>What is Encryption?</title>
- <para>
- Encryption is an ancient method of changing readable text to unreadable
- text that dates back to Egyptian times. Encryption takes the statement
- "Evolution" and turns it into something which cannot be read without help
- through decryption.
- <example>
- <title>Encryption Example</title>
- <para>
- Kevin orders an <application>Evolution</application> t-shirt from
- Ximian, Inc. over the internet. He puts in his credit card number
- which is 1234-567-8901. For security, his computer encrypts the
- credit card number so it can be safely transmitted over the internet.
- The number now is @#$23ui7yr87#@!48970fsd, which holds no intentional
- resemblance to the inital number. When the information gets to
- Ximian, Inc. it'll be decrypted into the inital number.
- </para>
- </example>
- Encryption can be used in email in two ways: to verify that the sender is
- the real sender, and to hide the message while in transmission.
- <application>Evolution</application> has the capability to do both.
- </para>
- </sect1>
- <sect1 id="generating-key">
- <title>Generating your PGP key</title>
- <para>
- First, you need to create a PGP key. To do this, you'll need GPG
- installed.
- </para>
- <tip>
- <title>GPG Versions</title>
- <para>
- This manual covers version 1.0.6 of GPG. If your version is different,
- this may not be entirely accurate. You may find out your version number
- by typing in: <command>gpg --version</command>.
- </para>
- </tip>
- <para>
- You can start by typing in: <command>gpg --gen-key</command>. At the
- first question, select 1. The next question asks you about key length.
- The longer the key, more stronger it is. However, the longer the key, the
- longer it takes to generate. This is your choice. However, 1024 bits
- (default) should be adequate. The next question asks you if you want your
- key to expire. Expiring keys make your key invalid after a certain amount
- of time, so old keys don't float around active. This is the same concept
- as a coupon at a supermarket. Next, you'll type in your Real name, your
- email address, and a comment. You should not forge this information, as
- it is used later to verify who you are. Assuming that all your
- information is correct, press "O" to continue. GPG now asks you for a
- passphrase. This is a password which you will need to decrypt and encrypt
- messages. This can be any length, with any characters in it. It is case
- sensitive, which means that it does know the difference between capital
- letters and lower-case. Now your key is generated. It is recommend you
- surf the internet, read your email, or write a letter in a word
- processor. This help creates randomness in the key.
- </para>
- <para>
- Once this is completed, you'll be dropped back to the command line.
- Now you can view your key information by typing <command>gpg
- --list-keys</command>. You should see something similar to this:
- <example id="gpg-list-keys">
- <title>GPG Listing Keys</title>
- <para>
- /home/bob/.gnupg/pubring.gpg
- ----------------------------
- pub 1024D/32j38dk2 2001-06-20 bob &lt;bob@bob.com&gt;
- sub 1024g/289sklj3 2001-06-20 [expires: 2002-11-14]
- </para>
- </example>
- You'll now need to upload your public key to a keyserver, so that your
- friends can use your key. You'll need to know the ID of your key, which
- is after the 1024D on the line beginning with pub. For this example, it
- is 32j38dk2. You now type in <command>gpg --send-keys --keyserver
- wwwkeys.pgp.net 32j38dk2</command>. Substitute your key ID for 32j38dk2.
- You will be prompted to type in your password <!-- verify that you need to
- enter your password here --> and your key will be uploaded for your
- friends to download.
- </para>
- </sect1>
- <sect1 id="encrypt-evo-integ">
- <title>Setting up Evolution's Encryption</title>
- <para>
- You'll need to open
- <menuchoice>
- <guimenu>Tools</guimenu>
- <guimenuitem>Mail Settings</guimenuitem>
- </menuchoice>
- Once there, select the account you'd like to associate the key to and click
- the <guibutton>Edit</guibutton> button. In the
- <guilabel>Security</guilabel> tab is a section labeled <guilabel>Pretty
- Goog Privacy</guilabel>. Enter your key ID and click
- <guibutton>OK</guibutton>. Your key is now integrated into your identity
- in <application>Evolution</application>.
- </para>
- </sect1>
- <sect1 id="encrypt-sending">
- <title>Sending Encrypted Messages</title>
- <para>
- You can either sign or encrypt a message. When you sign a message, verify
- that you were the one who sent it, and that no one is forging your
- identity. Encrypting a message makes it impossible for someone with
- prying eyes to view it while it's in tranmission.
- </para>
- <para>
- <sect2 id="sign-msg">
- <title>Signing a Message</title>
- <para>
- To sign a message, you simply click
- <menuchoice>
- <guimenu>Security</guimenu>
- <guimenuitem>PGP Sign</guimenuitem>
- </menuchoice>
- . You will be prompted for your PGP password. Once you enter it,
- click <guibutton>OK</guibutton> and your message will be signed.
- </para>
- </sect2>
- <sect2 id="encrypt-msg">
- <title>Encrypting a Message</title>
- <para>
- Encrypting a message is very similar to signing a message. You simply
- click the menu item
- <menuchoice>
- <guimenu>Security</guimenu>
- <guimenuitem>PGP Encrypt</guimenuitem>
- </menuchoice>
- </para>
- </sect2>
- </para>
- </sect1>
- <sect1 id="unencrypting">
- <title>Unencrypting a Recieved Message</title>
- <para>
- Sometimes, a friend will send you a message which is encrypted. In order
- for you to read it, you need to unencrypt it.
- </para>
- <para>
- When you view the encrypted message, <application>Evolution</application>
- will prompt you for your PGP password. You type in your PGP password and
- the message is then decrypted.
- </para>
- </sect1>
- </article>