The GNU Privacy Guard is a free replacement for the PGP PKI (Public Key Infrastructure) encryption tool. It can be used to encrypt data and to create digital signatures. It includes an advanced key management facility and is compliant with the proposed OpenPGP Internet standard. The main uses of GnuPG include digital signing and encryption of email messages and digital signing of software packages.
This article is intented as a simple introductory guide to GnuPG and not as a comprehensive guide to public key encryption.
[ Read more ]