Hi bsdgb, I can assure you that the 2FA system implemented on Silk Road generates perfectly good PGP messages, it seems like you've pasted the wrong public key hence you're unable to decrypt the message. You'll need to create a temporary account and contact support to see if they're able to help you out, Here is the link for SR Support: http://silkroad6ownowfk.onion/users/support/message Tang.