topic Desfire Ev1 changekey Error in NFC

Desfire Ev1 changekey Error

colin_costello2 — Tue, 21 May 2019 18:15:11 GMT

I keep getting CRC or MAC does not match data error when trying to change the key. Can anyone help me out with this?

Session Key (deciphered): B7 CB F4 14 E3 B4 B0 30 9F 01 07 7B 7B A2 12 DE
New PICC Key: 11 22 33 44 55 66 77 88 12 23 34 45 56 67 78 89
CRC16 for new PICC Key (deciphered): 7F ED
New PICC Key With CRC and with padding (deciphered): 11 22 33 44 55 66 77 88 12 23 34 45 56 67 78 89 7F ED 00 00 00 00 00 00

New PICC Key With CRC and with padding (ciphered) : AA 6D E2 CF 80 01 63 53 C0 94 8B 88 8C A7 44 51 51 93 04 1A F5 21 C1 9E

APDUCommmand:
--> 90 C4 00 00 19 00 AA 6D E2 CF 80 01 63 53 C0 94 8B 88 8C A7 44 51 51 93 04 1A F5 21 C1 9E 00
<-- 91 1E [ERROR]

Re: Desfire Ev1 changekey Error

andrey3 — Thu, 11 Jul 2019 07:19:27 GMT

Hello!

I have the same problem.

Did you find the answer eventually?

Re: Desfire Ev1 changekey Error

colin_costello2 — Thu, 11 Jul 2019 10:32:11 GMT

I have not found the answer yet. If you figure it out, please let me know!

Re: Desfire Ev1 changekey Error

zhijun — Thu, 27 Aug 2020 03:42:26 GMT

Hello！Have you found the answer for it?

Re: Desfire Ev1 changekey Error

colin_costello2 — Thu, 27 Aug 2020 13:44:43 GMT

No, I never did