OpenKeychain is an OpenPGP implementation for Android. Similar to what the well-known GnuPG software does on desktop systems, OpenKeychain primarily serves as a key management tool, but with a stronger focus on usability. Modern mobile devices allow new features like key exchange via QR or NFC, and support for secret keys stored on Yubikey devices.

On its own, OpenKeychain supports encryption, decryption, signature generation, and signature verification of files and text. In addition to stand-alone use, it comes with an API which makes crypto operations available for other apps. We are actively working together with K-9 Mail to bring secure email based on the OpenPGP standard to Android.