The RNG firmware is now available on Github. This firmware generate a continuous stream of random bytes through a VCOM port. Three modes of operation are available:

This is a demo firmware and, for a given security strength, throughput can certainly be improved. 

I'm going to start to work on a Fido2 demo application. I will let you know when I will have made substantial progress. I also plan to work on a open source contactless Java Card implementation of the FIDO2 standard. I have ordered an ACOSJ dual interface smart card as development platform.