The Encrypt Content processor can handle only one passworded PGP Secret key on a given keyring.
To decrypt files from multiple data sources with different passworded PGP Secret Keys, we are forced to create a separate key ring for each data source, containing a single passworded PGP Secret Key.
It would be optimal to be able to point the decryption processor at a single NIFI user keyring that had multiple data source Secret Keys, each passworded. We would then be able to pass either the SEC ID (eg; 1024D/671D6CAF or the UID (eg. dunnhumby - SMG - Prod) and the password for the given Secret Key.
Ideally the attached image would also include a Private Key Identifier to distinguish which jey on the ring to use, that would match the Private Keyring Passphrase.