I’ve finally got round to setting myself up with some OpenPGP-compatible keys, so that I can securely sign and encrypt emails and files. This is something that scares the USA and UK governments, as they like to spy on their citizens. The German government has a better attitude - they are actually funding development of this technology.
I’m using Gnu Privacy Guard (GPG), which is compatible with the famous and commercial PGP software via the Open PGP standard, and Enigmail, which signs, encrypts and decrypts emails in Mozilla and Netscape.
Just in case anyone wants it, here’s my public key.