Changes between Version 3 and Version 4 of openpgp/software/gpg

Timestamp:

Aug 28, 2012, 12:52:46 PM (13 years ago)

Author:

Jamie McClelland

Comment:

--

openpgp/software/gpg

@@ -104 +104 @@
 == Signing a key ==
 
-caff is a command line tool to help verify and sign keys.
+There are at least two ways to sign a key.
+
+=== Simple Method ===
+
+{{{
+gpg --edit-key jamie@mayfirst.org
+}}}
+
+That will put you in the gpg edit mode.
+
+Next type:
+
+{{{
+sign
+}}}
+
+And follow the prompts.
+
+When you are done, type:
+
+{{{
+quit
+}}}
+
+Now you have a signature in your local key ring. At this point, you can choose to either:
+ * Publish the key directly:
+  * First, lookup the key id:
+  {{{
+        gpg --list-key ross@ross.mayfirst.org
+  }}}
+  * Next, send the key, referencing the key id:
+  {{{
+  gpg --send-key EEC168BA
+  }}}
+
+This method has a draw back. If you are not certain that the owner of the key really does control the email address of the User ID that you just signed, you could be tricked into signing (and publishing publicly) and false key.
+
+The following method is safer:
+
+ * Email the signature (and entire key) to the recient
+  * First, export the key to a text file:
+  {{{
+  gpg --export --armour ross@ross.mayfirst.org > ross.asc
+  }}}
+        * Next, send ross.asc as an attachment to the key owner.
+
+There is still a small risk with this method - since the recipient may get a validly signed key that they could accidentally publish.
+
+=== Secure Method ===
+
+caff is a command line tool to help verify and sign keys in a more secure manner. With caff, the each user id on the key is individually signed, encrypted to that key and emailed to the email address associated with the key id. This ensures that it will only be published if the owner of the email address is also the owner of the corresponding private key.
 
 You can access it by installing the `signing-party` debian package:
@@ -112 +162 @@
 }}}
 
-caff depends on a working mail transport agent, which you can setup by following our [wiki:email_setup_postfix_debian postfix faq].
+caff depends on a working mail transport agent, which you can setup by following our [wiki:linux_simple_mail_relay esmtp faq].
 
 Then, lookup the keyid of the person whose key you would like to send, and type:
@@ -119 +169 @@
 caff <KEYID>
 }}}
+
+And follow all prompts. Near the end you will be left with a gpg prompt and no instruction. At this point, simply type: quit to save your signature and go to the next step.