I just wanted the evidence for the assertion that this is based on Nitrokey Pro. I don't understand what U2F has to do with its advertised purpose. Obviously it

I just wanted the evidence for the assertion that this is based on Nitrokey Pro. I don't understand what U2F has to do with its advertised purpose. Obviously it's a plus if you can use it for other things, and that doesn't compromise the implementation, but there doesn't seem to be a reason it should.