Gpg4win Now Available for Microsoft Outlook 2010/2013

Strong cryptography is essential to anyone who wants to communicate and transfer information safely online. Public-private key cryptography is especially useful, as it does not depend on secure channels for key exchange. Gpg4win is one such open-source email and file encryption solution for Windows users.The ISC Project is happy to announce that Gpg4win is now available for Microsoft Outlook 2010/2013 and now includes support for 64-bit versions of Microsoft Windows.


Gpg4win version 2.2 enables users to securely transmit email and files online with the help of encryption and digital signatures. Encryption protects the email and file content from unintended readers, while digital signatures ensure that the content is unmodified and actually comes from the indicated sender.

Gpg4win is maintained by the developers of GnuPG and supports both OpenPGP and S/MIME (X.509) cryptography standards. The software tool is the official GnuPG distribution for Windows.

Supported by a small grant from the ISC Project and developed by independent Germany-based software companies, g10 code GmbH and Intevation GmbH, the new version of Gpg4win addresses some of the shortcomings of previous versions. Most notably, the new version is compatible with 64-bit versions of Windows (including Windows 7 and Windows 8). The last major version of Gpg4win was developed for 32-bit Windows XP and Vista, and while it could run on 64-bit versions of Windows, the Gpg4win Internet Explorer extension, GpgEX, did not work properly. The Outlook extension GpgOL has been updated to provide basic support for Microsoft Outlook 2010 and 2013, where previous versions only supported Outlook up to 2007.

Given the growing debate over national security efforts and privacy concerns, the release of this new version coincides with an increased interest in email encryption. The new improvements also expand the software’s possible user base by enabling it to function effectively on a wider range of operating systems. As a result, downloads of the software from the developer’s website have doubled since the beginning of 2013. In addition, online donations to improve and maintain the Gpg4win initiative have increased, indicating continued interest and commitment of its users worldwide.

While the release of Gpg4win version 2.2 represents a positive step toward improving the safety of online communication, the Gpg4win initiative is committed to continuing to improve the software in the future. More information can be found at