The RPMS are signed with GPG, and you are advised to check the signature
before installing them, for your own security. You can obtain my public
key which has ID 97D3544E from any key server on pgp.net, e.g.
http://wwwkeys.eu.pgp.net
Ask me for my public key fingerprint if you want to be sure.
Note that you must import my public key into the RPM database (as root)
in order to check the GPG signature. See the man page for rpm. Here is
one way to do it: