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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:
http://www.nxp.com/documents/application_note/AN10922.pdf
The MIFARE Team
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:
http://www.nxp.com/documents/application_note/AN10922.pdf
The MIFARE Team
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