Notable Events

• 2021-12-21 Gpg4win 4 released, a major update. It includes GnuPG 2.3 for the first time and this means ECC is the default for new key-pairs.
• 2021-04-08: GnuPG 2.3.0 released, a major release with new crypto algorithm defaults and faster pubkey storage.
• 2020-01-07: GnuPG.com starts offering paid support for Gpg4win that is approved for EU RESTRICTED communication. (GnuPG.com is a brand of g10code the main developer of GnuPG and Gpg4win.)
• 2019-04-30: About detecting spoofed email signatures a writeup by GnuPG/Gpg4win

(NotableEventsHistory)

What are GnuPG and Gpg4win?

GnuPG is a Free Software for encrypting and signing emails and files. It runs on GNU/Linux, Windows, MacOS and other operating systems.

Gpg4win is a software bundle for Windows that includes GnuPG and additional software:

• An add-in for Outlook to handle crypto emails.
• An add-in for Explorer to handle files.
• Kleopatra, a graphical interface to manage keys (and offer some expert functions).

Get help

Documentation

Here you can find an overview of documentations that can help you to accomplish your task or find a solution for your problems.

Troubleshooting

Here you find different problems and possible solutions to solve them (mainly on Windows for Gpg4win)

Your help in this wiki is highly appreciated!

This forum is a community project and many different projects are working on it. You are invited to join us! If you find misspellings or outdated information feel free to fix them. For more ideas to contribute you can visit this page.

If you want to read more about the background of this wiki this is the right place.

GnuPG for Users

• Wie funktioniert E-Mail-Verschlüsselung mit PGP? Video, 3:35min (German video about how email encryption with OpenPGP works)
• Hints for EMailClients/Thunderbird users.
• LargeKeys: How many bits are enough?
• WebOfTrust: Understanding the web of trust
• GnomeKeyring: What to do when Gnome Keyring Hijacks your GPG Agent
• PlatformNotes - what to be aware of when using or administrating GnuPG on different platforms.
• X.509 hints (needed for S/MIME and trusted root certs)
• SmartCard hints
• Wishlist Where to submit feature requests
• Applications using GnuPG
• Tools that may help running or administrating GnuPG or Gpg4win
• EMailClients/Screenshots
• LDAPKeyserver: How to configure OpenLDAP as a keyserver.
• Hints for use with NFS
• How to use local secrets on a remote machine

GnuPG for Developers

• Web Key Directory and Service, which makes exchanging crypto mails much easier.
• Suggestions for common UX practices
• How to use GnuPG from your application (GnuPG's API)
• Implemented OpenPGP specification.
• BuildingFromGIT
• Building GnuPG 2.1: GnuPG 2.1 is the latest GnuPG version but as with all 2.x versions it has several dependencies, which make building it a bit more difficult. Here are some notes.
  • Building for Unix
  • Building for Windows
  • Building for Android
• API checker: Upstream-Tracker.org checks ABI/API changes for some libraries like gpgme, libgpg-error, libgcrypt.

Note that the tools can't necessary decide whether something is an ABI or API change. The output should be used as a hint to look for whether there might be a problem. We are not aware of any broken API or ABI contracts for the listed libraries.

• SignatureHandling
• DevelopingKleopatra
• NTBTLS (Not too bad TLS) client library
• OtherResearch

Other OpenPGP implementations/initiatives

• OtherFreeSoftwareOpenPGP
• OtherFreeSoftwareInitiatives
• NonFreeSoftwareOpenPGP

Planning

• Tasks
• OpenPGPEmailSummits
• OpenPGP.conf, last conf was 8+9th of Sept, 2016.