What is GNU Privacy Guard?
GNU Privacy Guard (GnuPG, GPG) is a software tool to encrypt and decrpyt emails and files. GNU Privacy Guard is based on an asymmetric encryption system, the so called OpenPGP standard. GNU Privacy Guard is a open source alternative to PGP (Pretty Good Privacy). First released in 1999, GnuPG is compatibel to the original PGP, known to be one of the most reliable encryption systems worldwide.
GnuPG, GPG and PGP are the most prominent implementations of the OpenPGP-Standard for asymmetric encryption. Supported by the german “Bundesamt für Sicherheit in der Informationstechnik” (Official german organisation for security in information technology) and recommended for companies as well as for private people. Following PGP, GNU Privacy Guard may be used not only to encrypt and decrypt data and emails but to sign emails and therefore prove the origin of the email.