So I cloned a card to the XM1, and now, even after performing “cwipe” - which performs successfully) , I get this message from the proxmark when scanning:
Also, running “hf mf cload xxxxx-dump.eml” (rather than “hf mf restore 1”) seems to work (no errors, but it does not appear to be an identical clone as it doesn’t work at work)
What does “static nonce” even mean? And is there a way to remove it?
In cryptography, a nonce is an arbitrary number that can be used just once in a cryptographic communication. It is similar in spirit to a nonce word, hence the name. It is often a random or pseudo-random number issued in an authentication protocol to ensure that old communications cannot be reused in replay attacks
So a static nonce would be a nonce that can’t be changed.
Thanks for the explanation.
What I don’t understand, is how a gen1a card that has been wiped, and only contains FFFFFFFFFFFF as keys, still show a static nounce?
I thought the whole point with gen1a was that they could be fully altered?
static nonce just means the PRNG (pseudorandom number generator) is fixed at 01200145 it wont cause any issues for your tag and is just preprogrammed by whoever created the chip, you cant remove it its a hard built feature
