Apparently, this user prefers to keep an air of mystery about them.
4 GPG vs PGP vs OpenSSH and management of them mar 5 '13
2 OpenPGP Public-Key algorithm sep 6
2 gnupg: display digest of key feb 14 '14
1 PGP message integrity : How can receiver of an email check the integrity using the sender's public key? jul 21 '14