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#1 2011-08-26 06:00:03

tjhowse
Contributor
Registered: 2011-08-05
Posts: 24

Two different Nt values?

So I've had success cloning my Mifare Classic 1k:
ATQA : 04 00
UID : 3a 10 bf bc 00 00 00 00 ee a0 dd 77
SAK : 08 [2]
SAK : MIFARE CLASSIC 1K
proprietary non-iso14443a card found, RATS not supported
isOk:01

I'm now trying a slightly different card:
ATQA : 04 00
UID : 6c 47 b0 73 00 00 00 00 ee a0 dd 77
SAK : 08 [2]
SAK : MIFARE CLASSIC 1K
proprietary non-iso14443a card found, RATS not supported

I ran hf mf mifare, it spat out about 160 periods before it found an invalid key and gave me an Nt value. I ran hf mf mifare <Nt> and it took slightly longer to produce another invalid key and a different Nt value.  Previously on this second pass I got a 12-digit hexadecimal number I could then plug into hf mf nested and get the A and B keys, but this time around I just got another invalid key and a different Nt value.

I'm running it a third time on the second Nt value, but it's up to about 770 periods without a result.

Any suggestions? I'm using build 486.

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#2 2011-10-17 00:46:53

kra
Contributor
Registered: 2011-01-19
Posts: 59

Re: Two different Nt values?

You can solve the problem ???  i have the problem too

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