• 16. March 2016 at 10:47
    I have problem about CMAC
    i read "ds134036_MF3ICD81 MIFARE DESFire EV1_3.6.pdf",in this document some command will be return "MAC" data,some command need it
    someone can tell me how to Calculate and Verify it?
    Which one document I need to study it?
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    Re: DESFire EV1 CARD

    16. March 2016 at 11:44
    Hi Jan,

    A MAC is a cryptographic checksum used in plain communication to protect the integrity of the massage. The CMAC is a method how to create diversified key from a master key. There is a suggestion by NXP for a method which is used in the SAM AV2 key store. You can find information about this method in the AN10922:

    The MIFARE Team
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