Armor Header,Use,Reference
BEGIN PGP MESSAGE,"Used for signed, encrypted, or compressed files.",[RFC9580]
BEGIN PGP PUBLIC KEY BLOCK,Used for armoring public keys.,[RFC9580]
BEGIN PGP PRIVATE KEY BLOCK,Used for armoring private keys.,[RFC9580]
BEGIN PGP SIGNATURE,"Used for detached signatures, OpenPGP/MIME signatures, and cleartext signatures.",[RFC9580]