Proxmark3 RFID Hacking / Research | Access Control Part 3

Introduction Or rather miniature guns, that pack a powerful punch… Our previous posting on Access Control Part 2: Mifare Attacks, we demonstrated a weakness in some Mifare implementations. Our previous attack relied on the use of a single default key, and using the nested attack to eventually recover all keys for the card.  Additionally, we used a rather cheap and affordable ACR-122U reader that costs approximately $40(USD), and the attack process…