An addendum to this. I've added another GPG HOWTO which specifically deals with sending an address encrypted in an order.http://dkn255hz262ypmii.onion/index.php?topic=29235.0This shows how to encrypt a message to anyone (including yourself) without leaving any data available that could be analysed to see who the message is from and who it is directed to.This should thoroughly settle the issue of encrypting data in an order while preserving anonymity, even if the vendor keeps the encrypted file after the order has been finalised. As long as it is not saved in a decrypted form then all bases are covered.