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#1 2019-08-20 14:58:06

PLAPhoneLoser
Contributor
Registered: 2019-08-17
Posts: 2

How can I use this authentication key from the reader?

Hey guys, I've got a question which I'm hoping someone can answer. First off, here's what I'm working with:

Proxmark3 Easy with the latest RRG firmware:
[ ARM ]
bootrom: RRG/Iceman/master/b7d412d2 2019-08-10 21:07:14
os: RRG/Iceman/master/b7d412d2 2019-08-10 21:07:21
compiled with GCC 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907]

Chameleon Mini: RevE Rebooted
Latest firmware as per the flashing instructions located here

I've got a Mifare Classic 1k card containing a value. The card is vulnerable to the Darkside attack so I already have the A and B keys. My question is in regards to the key that is read from the reader by my Chameleon. It's definitely not my A or B key. It's different. I might be wrong but I understand this is the 'password' used to read the keys on my card. I tried following along with the lab401 Reader Attack here but I can't figure out how to use the key I obtain for a nested attack, or any other type of attack really.

Can anyone give me some hints? What is this key used for? How can I use it to attack my card?

Thanks!

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