For those interested in staying up to date and taking part in computer security and privacy, these are some active mailing lists that deal with it: Off The Record (Encryption for IRC and IM) This list is used for open discussion about Off-the-Record (OTR) Messaging software. Subscribe at: http://lists.cypherpunks.ca/mailman/listinfo/otr-users Archived mailing list: http://lists.cypherpunks.ca/pipermail/otr-users/ The or-talk [...]

This tutorial shows how you can use GnuPG to secure and verify data on your Linux box but the first part is relevant for Windows users too.