At some point, simple identifiers cannot ensure proper access control anymore, and consumers switch to a more advanced solution: Mifare. But are Mifare-based devices actually as secure as the manufacturer claims? Let’s figure it out!

Hacking electronic turnstiles installed at building entrances is a popular trick shown in many movies. This article discusses RFID-based physical access control systems (PACS) and demonstrates how easily the most commonly used identifier, EM4100, can be faked.