Re: How to change Key in Mifare classic card

Forum MIFARE SmartCard IC`s MIFARE Classic How to change Key in Mifare classic card Re: How to change Key in Mifare classic card

Re: How to change Key in Mifare classic card

13. May 2015 at 16:58
Hi Microembedded,

to change the key for a sector you need the key for accessing the sector. Let’s assume the sector use factory settings, the default key A = FFFFFFFFFFFF. With this key you authenticate to that sector and write to the sector trailer the new keys A and B and the access condition bits. To have access (according the access condition bits) to the sector you have to use the new key henceforth.

Best regards,
The MIFARE Team
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