gpg (GNU Privacy Guard, GPG or GnuPG) is a cryptographic software of the pgp class that permits to:
- and encrypt
easily another sort of message or file.
In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP are used interchangeably.
- pgp (OpenPGP / Pretty Good Privacy) is the encryption standard,
- Gpg is the program that implements the standard.