Gpg4win enables users to securely transport emails and files with the help of encryption and digital signatures. Encryption protects the contents against an unwanted party reading it. Digital signatures make sure that it was not modified and comes from a specific sender.
Gpg4win supports both relevant cryptography standards, OpenPGP and S/MIME (X.509), and is the official GnuPG distribution for Windows. It is maintained by the developers of GnuPG. Gpg4win and the software included with Gpg4win are Free Software (Open Source; among other things free of charge for all commercial and non-commercial purposes). More Info »
Creation of Gpg4win was supported by the German Federal Office for Information Security (BSI).
Gpg4win is an installer for Windows and contains several Free Software components:
The backend; this is the actual encryption tool.
A certificate manager for OpenPGP and X.509 (S/MIME) and common crypto dialogs.
A plugin for Microsoft Outlook 2010/2013/2016/2019 (email encryption). With Outlook 2010 and higher GpgpOL supports MS Exchange Server.
A plugin for Microsoft Explorer (file encryption).
An alternative certificate manager for OpenPGP and X.509 (S/MIME).