2013 no new version of APG was released. Thus, OpenKeychain has been started with the intention of picking up the development to improve the user interface and API. A first version 2.0 has been released in January 2013. After three years without updates, APG merged back security fixes from OpenKeychain and some months later rebased an entire new version on OpenKeychain’s source code. However, this process stopped in March 2014, while the OpenKeychain developers continued to regularly release new versions. A number of vulnerabilities found by Cure53 have been fixed in OpenKeychain. These are still not fixed in APG since its last release in March 2014. Since K-9 Mail version 5.200, APG is no longer supported as a cryptography provider. References External links GitHub repository of OpenKeychain Free and open-source Android software OpenPGP Cryptographic software