Forum › MIFARE SDK › Cannot ChangeKey, Get 1E response. › Reply To: Cannot ChangeKey, Get 1E response.
Hi Warren,
Change the key does not implicit calculation necessarily, except you want to use a key diversification method. I would never “calculate” a master key, I would always use it from a (true) random source. This key value is saved onto the card with the ChangeKey() method.
A “session key” is used internally while the session after a successful authentication is running. This is not the card key!
Kind regards,
The MIFARE Team
Change the key does not implicit calculation necessarily, except you want to use a key diversification method. I would never “calculate” a master key, I would always use it from a (true) random source. This key value is saved onto the card with the ChangeKey() method.
A “session key” is used internally while the session after a successful authentication is running. This is not the card key!
Kind regards,
The MIFARE Team
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