協定 /
GPG
GNU Privacy Guard (GnuPG or GPG) is a GPL Licensed alternative to the PGP suite of cryptographic software. GnuPG is compliant with RFC 4880, which is the current IETF standards track specification of OpenPGP. Current versions of PGP (and Veridis' Filecrypt) are interoperable with GnuPG and other OpenPGP-compliant systems.
受支持的專案

AntiPrism
Live USB/memory card OpenELEC-based media server toolbox platform for securing the online presence, web browsing and communications.

FreedomBox
FreedomBox integrates privacy protection on a cheap plug server so everybody can have privacy.

GPG for Android
A port of the whole GnuPG 2.1 suite to Android.
Gnu Privacy Guard (GPG) gives you access to the entire GnuPG suite of encryption software. …

Gpg4win
Gpg4win is an installation package for Windows (XP, Vista, 7 and 8) with software tools and manuals for email and file encryption on behalf …

Kontalk
Phone number based messaging client for the masses, using XMPP and OpenPGP encryption. Backed by community-driven servers.