Comment 8 for bug 415527

Since PGP keys should be backed up on external media anyway, I believe it'd be great to be able to use gnupg encryption on the backups. In preferences, one could set a pgp key to encrypt with, and deja-dup would encrypt with that public key. Automated backups wouldn't require user interaction, or insecure password storage. I also believe that a pgp passphrase is more likely to be remembered than a backup password.