After implementing the Android app for FIDO2 authentication [/2019/08/05/some-progress-with-webauthn/] I started to implement the same functionality on the ESP32 development board.
After publishing the URU Key project people keep asking me to make it open source. I have tried to organize sources in a more readable way but I still think that plain C and ESP IDF are too difficult for the broad audience. And, unfortunately, the biometrics part is covered by NDA and can not be published.
This update was delayed due to summer holidays but it brings achievement of the very important milestone. Now we have a very minimal implementation of the FIDO2 authentication protocol on the Arduino framework. The simplicity of the Arduino platform and the availability of the hardware opens the door to secure authentication to everyone interested.
Recently I have received the new batch of PCBs for my URU Card [/2020/06/29/uru-card-arduino-fido2-authenticator/] device. Since I do not have a 3D printer and appropriate skills I am going to construct a hard shell using the stack of PCBs. This time I have chosen black colour for the boards as it comes in a nice matt finish.