Reply To: Picking the right key for DESFire EV2 cards when UIDs are unreliable/unavailable

Forum MIFARE general topics and applications Picking the right key for DESFire EV2 cards when UIDs are unreliable/unavailable Reply To: Picking the right key for DESFire EV2 cards when UIDs are unreliable/unavailable

Re: Picking the right key for DESFire EV2 cards when UIDs are unreliable/unavailable

4. November 2020 at 9:03
Hi Mario,

An Addendum. What I called as “unique diversification value” is usually the UID of the card or some other constant which is unique for the card in the field. There exists an application note from NXP where the key diversification is explained:

https://www.nxp.com/docs/en/application-note/AN10922.pdf

The TapLinx team

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