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Thanks for the answer.
I am able to do personalization in SL0 and switch from SL1 to SL3 and also to read/write in SL3, but only with the keys that I personalized in the first step on a blank SL0 card.
How can I change an AES sector key after authentication? In SL3 if I authenticate to sector 0x4000 and then write the new key to 0x4000 with write plain maced it doesn't seem to stay persistent, after poweroff/poweron of the card I still need to authenticate with the original key, the new key that I write in 0x4000 seems to be ignored.
To be more exact, the problem is that we are in the process of requesting our Mifare Plus S cards to come personalized in SL1 instead of blank and in SL0, but we want to change the factory provided sector keys for security purposes and I'm not sure what the procedure is to change an AES key.
I am able to do personalization in SL0 and switch from SL1 to SL3 and also to read/write in SL3, but only with the keys that I personalized in the first step on a blank SL0 card.
How can I change an AES sector key after authentication? In SL3 if I authenticate to sector 0x4000 and then write the new key to 0x4000 with write plain maced it doesn't seem to stay persistent, after poweroff/poweron of the card I still need to authenticate with the original key, the new key that I write in 0x4000 seems to be ignored.
To be more exact, the problem is that we are in the process of requesting our Mifare Plus S cards to come personalized in SL1 instead of blank and in SL0, but we want to change the factory provided sector keys for security purposes and I'm not sure what the procedure is to change an AES key.
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