tl;dr; without even watching those: Most popular card/fobs (95%+ of all I've seen) don't use challenge-response, but always transmit the same 26 bytes. I don't

tl;dr; without even watching those: Most popular card/fobs (95%+ of all I've seen) don't use challenge-response, but always transmit the same 26 bytes. I don't have to explain how "secure" is that.