f010bd39cf
2001-08-15 Kjartan Maraas <kmaraas@gnome.org> * no/*: Added beginnings of a Norwegian translation. * sgmldocs.make: Forgot to add this. Kinda important. svn path=/trunk/; revision=12070
148 lines
6.2 KiB
Plaintext
148 lines
6.2 KiB
Plaintext
<!DOCTYPE article PUBLIC "-//GNOME//DTD DocBook PNG Variant V1.1//EN"[]>
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<article>
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<sect1 id="encryption-intro">
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<title>What is Encryption?</title>
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<para>
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Encryption is an ancient method of changing readable text to unreadable
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text that dates back to Egyptian times. Encryption takes the statement
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"Evolution" and turns it into something which cannot be read without help
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through decryption.
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<example>
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<title>Encryption Example</title>
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<para>
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Kevin orders an <application>Evolution</application> t-shirt from
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Ximian, Inc. over the internet. He puts in his credit card number
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which is 1234-567-8901. For security, his computer encrypts the
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credit card number so it can be safely transmitted over the internet.
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The number now is @#$23ui7yr87#@!48970fsd, which holds no intentional
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resemblance to the inital number. When the information gets to
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Ximian, Inc. it'll be decrypted into the inital number.
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</para>
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</example>
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Encryption can be used in email in two ways: to verify that the sender is
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the real sender, and to hide the message while in transmission.
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<application>Evolution</application> has the capability to do both.
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</para>
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</sect1>
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<sect1 id="generating-key">
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<title>Generating your PGP key</title>
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<para>
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First, you need to create a PGP key. To do this, you'll need GPG
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installed.
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</para>
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<tip>
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<title>GPG Versions</title>
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<para>
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This manual covers version 1.0.6 of GPG. If your version is different,
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this may not be entirely accurate. You may find out your version number
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by typing in: <command>gpg --version</command>.
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</para>
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</tip>
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<para>
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You can start by typing in: <command>gpg --gen-key</command>. At the
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first question, select 1. The next question asks you about key length.
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The longer the key, more stronger it is. However, the longer the key, the
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longer it takes to generate. This is your choice. However, 1024 bits
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(default) should be adequate. The next question asks you if you want your
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key to expire. Expiring keys make your key invalid after a certain amount
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of time, so old keys don't float around active. This is the same concept
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as a coupon at a supermarket. Next, you'll type in your Real name, your
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email address, and a comment. You should not forge this information, as
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it is used later to verify who you are. Assuming that all your
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information is correct, press "O" to continue. GPG now asks you for a
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passphrase. This is a password which you will need to decrypt and encrypt
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messages. This can be any length, with any characters in it. It is case
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sensitive, which means that it does know the difference between capital
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letters and lower-case. Now your key is generated. It is recommend you
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surf the internet, read your email, or write a letter in a word
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processor. This help creates randomness in the key.
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</para>
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<para>
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Once this is completed, you'll be dropped back to the command line.
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Now you can view your key information by typing <command>gpg
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--list-keys</command>. You should see something similar to this:
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<example id="gpg-list-keys">
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<title>GPG Listing Keys</title>
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<para>
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/home/bob/.gnupg/pubring.gpg
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----------------------------
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pub 1024D/32j38dk2 2001-06-20 bob <bob@bob.com>
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sub 1024g/289sklj3 2001-06-20 [expires: 2002-11-14]
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</para>
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</example>
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You'll now need to upload your public key to a keyserver, so that your
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friends can use your key. You'll need to know the ID of your key, which
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is after the 1024D on the line beginning with pub. For this example, it
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is 32j38dk2. You now type in <command>gpg --send-keys --keyserver
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wwwkeys.pgp.net 32j38dk2</command>. Substitute your key ID for 32j38dk2.
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You will be prompted to type in your password <!-- verify that you need to
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enter your password here --> and your key will be uploaded for your
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friends to download.
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</para>
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</sect1>
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<sect1 id="encrypt-evo-integ">
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<title>Setting up Evolution's Encryption</title>
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<para>
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You'll need to open
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<menuchoice>
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<guimenu>Tools</guimenu>
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<guimenuitem>Mail Settings</guimenuitem>
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</menuchoice>
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Once there, select the account you'd like to associate the key to and click
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the <guibutton>Edit</guibutton> button. In the
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<guilabel>Security</guilabel> tab is a section labeled <guilabel>Pretty
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Goog Privacy</guilabel>. Enter your key ID and click
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<guibutton>OK</guibutton>. Your key is now integrated into your identity
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in <application>Evolution</application>.
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</para>
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</sect1>
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<sect1 id="encrypt-sending">
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<title>Sending Encrypted Messages</title>
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<para>
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You can either sign or encrypt a message. When you sign a message, verify
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that you were the one who sent it, and that no one is forging your
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identity. Encrypting a message makes it impossible for someone with
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prying eyes to view it while it's in tranmission.
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</para>
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<para>
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<sect2 id="sign-msg">
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<title>Signing a Message</title>
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<para>
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To sign a message, you simply click
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<menuchoice>
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<guimenu>Security</guimenu>
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<guimenuitem>PGP Sign</guimenuitem>
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</menuchoice>
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. You will be prompted for your PGP password. Once you enter it,
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click <guibutton>OK</guibutton> and your message will be signed.
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</para>
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</sect2>
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<sect2 id="encrypt-msg">
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<title>Encrypting a Message</title>
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<para>
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Encrypting a message is very similar to signing a message. You simply
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click the menu item
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<menuchoice>
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<guimenu>Security</guimenu>
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<guimenuitem>PGP Encrypt</guimenuitem>
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</menuchoice>
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</para>
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</sect2>
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</para>
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</sect1>
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<sect1 id="unencrypting">
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<title>Unencrypting a Recieved Message</title>
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<para>
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Sometimes, a friend will send you a message which is encrypted. In order
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for you to read it, you need to unencrypt it.
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</para>
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<para>
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When you view the encrypted message, <application>Evolution</application>
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will prompt you for your PGP password. You type in your PGP password and
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the message is then decrypted.
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</para>
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</sect1>
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</article>
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