GnuPG allows you to encrypt and sign your data and communications; it features a versatile key management system, along with access modules for all kinds of public key directories. GnuPG normally checks that the timestamps associated with keys and signatures have plausible values. GPG includes the tools you need to use public key encryption and digital signatures on your Linux system. GnuPrivacy Guard (GPG) allows you to securely encrypt files so that only the intended recipient can decrypt them. Encryption commands such as gpg can be used to secure your most sensitive files on Linux systems.