I set up a PGP keyset tonight and it wasn’t as baffling as it seemed at first Seahorse (Linux) is just right for managing keys.
PGP allows me to digitally sign documents, e-mails, whatever, and then allows you to verify that it was really I who signed / sent / wrote the document.
Not that I’ll be using this much, but I’ll need it for the Ubuntu stuff later. Mez insists that I need my key signed by a current member, but I can’t find that requirement anywhere. So we’ll see.