Proxmark3 - Mifare card cracking [PART 2]

In this tutorial, I&explain to you the memory organization of a Mifare card + how to crack it. It is an RFID tool that has been used to crack hotel rooms cards and bypass their security systems. The proxmark3 is a powerful general-purpose RFID tool, the size of a deck of cards, designed to snoop, listen and emulate everything from Low Frequency (125kHz) to High Frequency (13.56MHz) tags. This is the second part of a series of tutorials about the use of proxmark3 and how to crack cards. Proxmark3 can be used for card cracking or card hacking as well.