Forum › MIFARE general topics and applications › DESFIRE EV1 ChangeKey › Reply To: DESFIRE EV1 ChangeKey
Hi Jan,
You can always call GetKeyVersion() without a previous authentication. With the ChangeKey() command the key version is updated.
The key version is important, if you have to update the card or issue a substitute card with a new key. It might be important in the service station which key – or in other words – which key version is used. But this depends on your particular implementation and which encryption method is used (e.g.: key diversification etc.).
The MIFARE Team
You can always call GetKeyVersion() without a previous authentication. With the ChangeKey() command the key version is updated.
The key version is important, if you have to update the card or issue a substitute card with a new key. It might be important in the service station which key – or in other words – which key version is used. But this depends on your particular implementation and which encryption method is used (e.g.: key diversification etc.).
The MIFARE Team
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