MIFARE DESFIRE® Compatible UID Modifiable Emulator CardThe MIFARE DESFire® remains the gold standard for ultra-high security badges, renowned for its robust defense against all forms of analysis. Its inner workings are protected by strict NDAs, making reverse engineering virtually impossible.KSEC offers MIFARE DESFire® EV2 Compatible Modifiable UID / ATQA / SAK / ATS / APDU Cards, which emulate the MIFARE DESFire® card. These cards allow customization of the UID, ATQA, SAK, ATS, and APDU values, enabling simulation of various DESFire® card types, including EV1 and EV2.Please note, these cards do not replicate any other MIFARE DESFire® features.The badges are available in a white PVC card format and are fully compatible with Proxmark 3.How to change the DESFire UID and other valuesChanging the UID Using your Proxmark 3, you can issue the following command:Change UID Command hf 14a raw -s -c -t 1000 cf00000000CD00<uid>Example: Set UID to 11223344556677 hf 14a raw -s -c -t 1000 cf00000000CD0011223344556677Setup ATS Command hf 14a raw -s -c -t 1000 cf0000000034< Length > < ATS >The length is set to 0, indicating that ATS is not sentWhen SAK is 20, 28, be sure to set ATS, otherwise you can’t read the card.The last two digits of ATS are CRC, which cannot be counted into the lengthExample: Modify ATS to 060675781028002F0 hf 14a raw -s -c -t 1000 cf000000003406067577810280 Setting up ATQA and SAK:Setup ATQA / SAK Command hf 14a raw -s -c -t 1000 cf0000000035<ATQA><SAK> * Note that ATQA is inverted on the ProxmarkExample: Set ATQA to 00 44 and SAK to 28 hf 14a raw -s -c -t 1000 cf0000000035440028IMPORTANT:The UID of MIFARE DESFire® Compatible UID Modifiable tags is comprised of two parts: the UID itself, and the BCC. The BCC is a checksum value calculated from the UID. If the BCC is incorrect, tag will be rejected by the reader.Most RFID tools, such as the Proxmark, LibNFC, MCT etc automatically calculate the BCC when the UID is modified. If you are modifying the UID by hand, it is vital that the BCC is correctly calculated.KSEC cannot provide support or refunds under any circumstances for cards that were ‘bricked’ due to incorrect UID/BCC configuration.FREQUENTLY ASKED QUESTIONSWHAT ARE THE ATS VALUES?The card responds with 06 75 77 81 02 80 02 F0
