However, so far all my efforts to obtaining a physical hardware token supporting the FIDO U2F specs for testing were without success.
What I would be particularly interested in, is decrypting short messages with the
sign request and simply provide the data to be decrypted as websafe-base64-encoded
In my understanding, the response returned from the device would be the decrypted challenge.
Am I correct with this or do I misunderstand the way challenge/response is implemented here?