Forum › MIFARE general topics and applications › Mifare DESFIRE EV1 CMAC Calculation › Reply To: Mifare DESFIRE EV1 CMAC Calculation
Hi Barış,
The CMAC calculation requires a key. Without knowing the key, I cannot verify your results. Second, the “MIFARE CMAC” is not exactly the same as explained in the NIST SP 800-38B documentation. The “NIST CMAC” uses always an IV of zero, but the “MIFARE CMAC” uses an IV from the previous operation.
The TapLinx team
The CMAC calculation requires a key. Without knowing the key, I cannot verify your results. Second, the “MIFARE CMAC” is not exactly the same as explained in the NIST SP 800-38B documentation. The “NIST CMAC” uses always an IV of zero, but the “MIFARE CMAC” uses an IV from the previous operation.
The TapLinx team
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