With MTools, it's easy to add card and keys for sector with valid data. So try to read all datas in MCT and compare to dump file with another amount. Mostly, the manufacture only use 1 or 2 sectors to store the valid data. Mkeys works with Enumeration, not hacking with the libnfc. Or you can try your luck with another APP named MKeys. To crack keys, you have to use external device such as ACR122U, PN532, PM3. The keyA or keyB is necessary to access the data in each block. Mifare 1K Card is organized in 16 sectors of 4 blocks and one block consists of 16 byte. This article shows how to use NFC as a mifare reader to read the amount remaining in the card. With NFC on Android Phone, it's even easy to read datas in the mifare card, such as Metro Card, RFID Parking card and etc. NFC has been widely used on Android Pay, Apple Pay and Device Connection.
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