PGP (Pretty Good Privacy) is a data encryption/authentication protocol, which is commonly used for email messages.
Pretty Good Privacy (PGP) is an encryption program that provides cryptographic privacy and authentication for data communication. PGP is often used for signing, encrypting, and decrypting texts, e-mails, files, directories, and whole disk partitions and to increase the security of e-mail communications. It was created by Phil Zimmermann in 1991.
PGP and similar software follow the OpenPGP standard (RFC 4880) for encrypting and decrypting …