Forum › MIFARE general topics and applications › DesFireEv1 Authentication – RndA received is wrong › Reply To: DesFireEv1 Authentication – RndA received is wrong
Hi Riyaz,
You should first select the application to want to work with it. Select application AID = 000000 if you want to authenticate with PICC Master Key.
If the card responds successfully in the last stage, you know the RndB was correct encrypted on cards side. If you do not get the correct RndA, it is highly possible that you make a mistake in the last calculation stage. Please check if you update the IV in the last step correctly and do not forget to rotate the random value.
The TapLinx team
You should first select the application to want to work with it. Select application AID = 000000 if you want to authenticate with PICC Master Key.
If the card responds successfully in the last stage, you know the RndB was correct encrypted on cards side. If you do not get the correct RndA, it is highly possible that you make a mistake in the last calculation stage. Please check if you update the IV in the last step correctly and do not forget to rotate the random value.
The TapLinx team
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