13.56 MHz is an advanced form of RFID. The chips in this system are not just preprogrammed memories, but rather, basic microcontrollers. 13.56 MHz chips can handle more advanced protocols, and the system supports encryption and authentication. Because they use microcontrollers, many tags are writeable, allowing you to store your own information on them. Some, however, are write‑protected from the factory. The system has a slightly shorter range than 125 kHz and is more easily blocked by objects.
13.56 MHz systems are used in payment cards, public transport cards, and more security‑sensitive access systems.



