GNU Privacy Guard (GnuPG or GPG) is a free-software replacement for Symantec 's PGP cryptographic software suite, and is compliant with RFC 4880, the IETF standards-track specification of OpenPGP. Modern versions of PGP are interoperable with GnuPG and other OpenPGP-compliant systems.

OpenPGP is the most widely used email encryption standard. It is defined by the OpenPGP Working Group of the Internet Engineering Task Force (IETF) as a Proposed Standard in RFC 4880. OpenPGP was originally derived from the PGP software, created by Phil Zimmermann. About - OpenPGP Aug 15, 2016 OpenPGP - The Smart Card OpenPGP is the most widely used email encryption standard in the world. It is defined by the OpenPGP Working Group of the Internet Engineering Task Force (IETF) Proposed Standard RFC 4880. The OpenPGP standard was originally derived from PGP (Pretty Good Privacy), first created by Phil Zimmermann in 1991. RFC 4880 - OpenPGP Message Format

OpenPGP is the most widely used email encryption standard in the world. It is defined by the OpenPGP Working Group of the Internet Engineering Task Force (IETF) Proposed Standard RFC 4880.

Mar 09, 2017 OpenPGP Studio - Free download and software reviews - CNET

Thunderbird to add built-in support for OpenPGP email

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