PGP and GPG PGP - Pretty Good Privacy GPG - GNU Privacy Guard oder GnuPG The Free Software Foundation has developed its own OpenPGP-compliant program called GNU Privacy Guard (abbreviated GnuPG or GPG). Install GPG on MacOS Installing homebrew first Refer to And install it. brew install gnupg Use GPG keygen Generate a key pair gpg --gen-key Real name: My Realname Email Address: (Okay) (Enter the pass) As a default, the key type is RSA 2048.