Problem with decrypt key 0 in C#

[alain prioux]

With key number 0 and key="00..0" (32 times),I try this:

Initiating auth. cde by PCD ->90 0A 00 00 01 00 00

Receive <-14 4B D4 E8 6D C4 FC 1C 91 AF (last 4 car=response OK)

I try to decrypt the string (14..1C) with .net framework implementation TripleDESCryptoServiceProvider,

and IV=new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

and key=new byte[] {0x00,...,0x00}(32 times)

BUT decrypt doesn't work.

Can somebody help me?

Thanks in advance.

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[alain prioux]

I forget: Mifare Desfire EV1

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[TapLinx Support]

Hi Alain,

I cannot say anything about the implementation in other frameworks. For the communication for the MIFARE DESfire, I recommend reading the application note:

AN0945 – MIFARE DESFire EV1 – Features and Hints

You will find all information you need for encrypted communication and authentication. It is available in NXP DocStore.

The TapLinx team

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