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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>