@arcanicanis @silverpill My example’s a humorous schizo exaggeration, but one could do it with a cellular modem or some passive antenna that only transmits when energized by a specific frequency, akin to the Great Seal bug.
I’m somewhat interested in this stuff as means to proliferate public/private key authentication. I see the utility of bespoke hardware, but I’m not too interested in using it.
I would’ve liked for the FIDO standard to have included a way for the authenticator to interrogate an RP server in someway. It’d be better to have the ability to use alternative sources of trust than to relay on a FIDO server existing in perpetuity.