Forum › MIFARE SDK › Desfire EV1, format, writedata, changekey all failed with Authentication Error › Reply To: Desfire EV1, format, writedata, changekey all failed with Authentication Error
Hi Anitha,
You need more than one card at your desk in the development phase of your project. In particular, changing the keys is a sensitive operation. If anything goes wrong, you write wrong bytes into the key. Please take in mind, there exist no “read key” command! You understand why: it would be a massive security flaw! You can use the key and change the key if you have shown with an authentication that you know the key.
The TapLinx team
You need more than one card at your desk in the development phase of your project. In particular, changing the keys is a sensitive operation. If anything goes wrong, you write wrong bytes into the key. Please take in mind, there exist no “read key” command! You understand why: it would be a massive security flaw! You can use the key and change the key if you have shown with an authentication that you know the key.
The TapLinx team
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