OpenPGP is a standard for encrypting and decrypting data.PGP stands for “Pretty Good Privacy” and it is a program by which you can secure your data and e-mails, freely. Philip Zimmermann was the pioneer of PGP (Pretty Good Privacy) and he created it, way back in 1991.
What is GnuPG?
GnuPG (GNU Privacy Guard) is one of the most versatile and free implementation of the OpenPGP program. GnuPG is available for various operating systems including windows vista or windows XP, Ubuntu Linux and MAC. GnuPG plugins are also available for firefox (FireGPG) and Thunderbird (Enigmail).However, you must have GnuPG installed for these plugins to work.
How does GnuPG help?
GnuPG allows you to encrypt and sign your data and communication, and it uses PKI for encryption.GnuPG also features a versatile key managment system as well as access modules for all kind of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.