 | |
| Developer(s) | The Gpg4win initiative |
|---|---|
| Initial release | April 6, 2006; 18 years ago (2006-04-06) |
| Stable release | 4.4.0 (with GnuPG 2.4.7) (November 28, 2024; 3 months ago (2024-11-28)[1]) [±] |
| Preview release | 5.0.0-beta145 (with GnuPG 2.5.5) (March 10, 2025; 7 days ago (2025-03-10)[2]) [±] |
| Repository | dev |
| Operating system | Windows |
| Type | Encryption software |
| License | GPLv2+ |
| Website | gpg4win |
Gpg4win is an email and file encryption package for most versions ofMicrosoft Windows andMicrosoft Outlook, which utilises theGnuPG framework forsymmetric andpublic-key cryptography, such as data encryption,digital signatures,hash calculations etc.
The original creation of Gpg4win was initiated and funded by Germany'sFederal Office for Information Security (BSI) in 2005,[3][4] resulting in the release of Gpg4win 1.0.0 on 6 April 2006;[5] however Gpg4win and all included tools arefree and open source software, and it is typically the non-proprietary option for privacy recommended[6][7] to Windows users.
As Gpg4win v1 was a much overhauled derivate of GnuPP,[8] both were usingGnuPG v1 for cryptographic operations and thus only supportedOpenPGP as cryptography standard.
Hence in 2007 the development of a fundamentally enhanced version was started, also with support from the German BSI (Federal Office for Information Security); this effort culminated in the release of Gpg4win 2.0.0 on 7 August 2009 after a protracted beta testing phase,[9] which was based on GnuPG 2.0, included S/MIME support, Kleopatra as a new certificate manager, theExplorer plug-in GpgEX for cryptography operations on files, basic support ofsmart cards, a full set of German dialogue texts in addition to the English ones, new manuals in English and German, plus many other enhancements.[10]
In contrast to Gpg4win v2, which focused on new features and software components, the development of Gpg4win v3 focused on usability, plus consolidation of code and features:[11] This resulted in the release of Gpg4win 3.0.0 on 19 September 2017 with proper support forElliptic Curve Cryptography (ECC) by utilising GnuPG 2.2 (instead of 2.0), broadened, stabilised and enhanced smart card support, a fundamentally overhauledOutlook plug-in GpgOL for Outlook 2010 and newer, support of 64-bit versions of Outlook 2010 and newer, supporting dialogues in all languages which KDE supports etc.[12] It is also distributed as GnuPG VS-Desktop with commercial support and approval for handlingNATO RESTRICTED,RESTREINT UE/EU RESTRICTED andGerman VS-NfD documents, which in turn has become the major source of revenue for maintaining and further developing the GnuPG framework and Gpg4win.[13]
Gpg4win 4.0.0, released on 21 December 2021,[14] switched to using GnuPG 2.3 (from 2.2) and continued to refine and enhance the feature set of Gpg4win v3.[15]
Germany's Federal Office for Information Security (BSI)…in 2006…funded the development of GPG4win
Timestamp of installer file `gpg4win-1.0.0.exe`: 06 April 2006
Press release: Gpg4win 2.0.0 is ready, it does S/MIME and secure attachments
