What is GnuPG/Gpg4win?

GnuPG is a software for the encryption of emails and files that runs on Linux and Windows. It is also included in Gpg4win which was developed especially for Windows. Gpg4win is a bundle of software and beside GnuPG it contains for example an addon for Outlook and Kleopatra which allows users to manage their keys and do other tasks in a graphical user interface.

You can find more information about Gpg4win (releases, previous contracts etc.) here

Get help with GnuPG/Gpg4win

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 If you find misspellings or outdated information feel free to fix them.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

• 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)
• 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

Notable Events

• 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)

Planning

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