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I use RFID Reader read mifare card 1k.
http://www.stronglink-rfid.com/en/rfid-readers/sl500.html
I want encode mifare card to protected when card lost.
All people can read id of card and hacker can back and fake id card to steal anything.
And I can't change key A and key B.
Default key always is FFFFFFFFFFFF.
Thank you!!!
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Hello,
The key is stored in the memory of tag. In the Mifare documentation part Memory organization you can see where are/is the key : http://www.nxp.com/documents/data_sheet/MF1S503x.pdf.
Then, you write with your default FF key your new key at his adress.
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