OverviewWHAT IS GnuPG?

Open source encryption for your files and emails

GnuPG is short for GNU Privacy Guard, and it’s the open source version of the venerable PGP (Pretty Good Privacy) tool for encrypting files and emails.
t enables you to encrypt and digitally sign data and documents with technology that’s effectively unbreakable, and although GnuPG itself is a command line client (so you’d run it in a DOS window) there are dozens of programs that wrap its encryption in a more welcoming environment, such as Claws Mail and Kleopatra (pictured above). If you’re sharing data that simply can’t fall into the wrong hands, GnuPG is an important tool.

The GNU Privacy Guard
GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP). GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications. A wealth of frontend applications and libraries are available. Version 2 of GnuPG also provides support for S/MIME and Secure Shell (ssh).

GnuPG is Free Software (meaning that it respects your freedom). It can be freely used, modified and distributed under the terms of the GNU General Public License .

GnuPG comes in three flavours:

-2.1.14 is the modern version with support for ECC and many other new features,
-2.0.30 is the stable version which is currently mostly used.
and 1.4.21 is the classic portable version.
Project Gpg4win provides a Windows version of GnuPG stable. It is nicely integrated into an installer and features several frontends as well as English and German manuals. A simple Windows installer for the modern version is available at our download page.