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authorKevin Breit <battery841@mediaone.net>2001-06-21 22:13:27 +0800
committerKevin Breit <battery841@src.gnome.org>2001-06-21 22:13:27 +0800
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2001-06-21 Kevin Breit <battery841@mediaone.net> * C/encryption.sgml: Added file svn path=/trunk/; revision=10354
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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>