Desfire EV1 – Three pass authentication Error

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  • 23. October 2017 at 11:32

    ccdaniel
    Hy MifareTeam,

    my authentication goes wrong when i decrypt the received "RndA'_enc".

    Received: <> AFE90D350785C8613403670BC42B3B98D5
    Received: < RndA': 9C6137F801D77D55 != RndA(rotated)

    Key: 0000000000000000

    In this Example, i set IV: 03670BC42B3B98D5, when i decrypt "RndA'_enc".

    Who can i get the full description of DESFire native command set and the three pass authentication?

    Best regards
    Daniel Müller
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    Re: Desfire EV1 – Three pass authentication Error

    23. October 2017 at 11:34

    ccdaniel
    Received: 00DF7839B54D78B5D2
    RndB_enc : DF7839B54D78B5D2
    RndB : E797CAEEDEEB3143
    RndB' : 97CAEEDEEB3143E7
    RndA : 5FE73F8971525937
    RndA+B' : 5FE73F897152593797CAEEDEEB3143E7
    RndA+B'_enc: E90D350785C8613403670BC42B3B98D5
    SEND: AFE90D350785C8613403670BC42B3B98D5
    Received: 004F6188458D596C1E
    RndA'_enc: 4F6188458D596C1E
    Decrypt: -> RndA': 9C6137F801D77D55 != RndA(rotated)
    + 0  |  - 0

    Re: Desfire EV1 – Three pass authentication Error

    2. November 2017 at 13:31

    TapLinx Support
    Hi Daniel,

    You can get the native datasheet and application notes with calculated examples from NXP. But this is NDA classified material and you need a legal business address for getting it. Unfortunately students and hobby enthusiasts cannot sign a NDA.

    Regards,
    The TapLinx team
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