PGP is the name of the encryption protocol. GPG (rather confusingly) is the name of a program that will do the encryption for you. It's a particular implementation. Kind of like DOC is a word processor file format, while Word and LibreOffice are programs that create DOC files. You don't have to encrypt your address. Most vendors will process the order anyway. It's just a really, really, really good idea to encrypt it. If you're confused, I suggest reading the post stickied at the top of this subforum http://dkn255hz262ypmii.onion/index.php?topic=42094.0 There are step by step guides on using PGP. Note: you don't have to create your own key if you don't mind conversing with the vendors in plaintext. You only need to know how to import their public keys and use them to encrypt your address.