Finally it is possible to use Nitrokey on Android smartphones. OpenKeychain, the popular Android app for OpenPGP encryption, supports Nitrokey. You can use your private keys on your Nitrokey to encrypt, decrypt and sign emails using OpenKeychain. Before you get too excited, a USB adapter cable is required which obviously doesn’t offer optimal usability. But this will no longer be required with future Nitrokey releases (stay tuned!) and is just the first step towards making Nitrokey “mobile friendly”.