Changing Default Key NFC Card

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Hi, what exactly do you want to change? Mifare has keys in each sector of reading writing (15 in total) These keys can be changed normally in any tag. On the other hand there is a unique number in each tag called UID (anti-collision identifier). If this is the number you want to change, it is only possible in some models of Tags There are certainly other NFC-A tags available (typically from Chinese suppliers) that behave similar to NXP MIFARE products and permit changing the UID using special commands. Note that it's a really bad idea to use the UID/anti-collision identifier (or any other freely readable data) of NFC/RFID tags for authentication purposes since that information can easily be cloned. In both cases In both cases the same can be done with the detailed limitations. Regards,

I have already implemented solution for Desfire EV1 to change default or any master key of the card.(Java and android) Telpo Terminal Applications (Android NFC Reader) EPrime : Retail Application Dialog : Cale Parking Terminal Application HNB : SmartPay Terminal Application Kifiya : Bus Ticketing Application FAMACO Terminal Applications Dialog : Touch Card Top-up Application EPrime : Retail Application Beep : Retail Application Android Applications Dialog : Touch4it Application HNB : Solo Application LB : Merchant/Client Application Dubai RTA : HCE Application NEWPOS 8110 Applications Dialog : Touch OTSEA Library