Abstract: Due to the limitation of relevant devices, a lot of security problems exist in a radio frequency identification (RFID) system, one of the core technologies of the future internet of things (IOT). A new protocol based on the two-dimensional region (TDR) Hash chains was proposed after the core ideas of several typical RFID cryptographic protocols were analyzed. TDR could significantly improve the efficiency of database retrieval by identifying each Hash chain with region division. Moreover, a random number was introduced to further enhance the security of RFID systems.

Key words: RFID, cryptographic protocol, two-dimensional region Hash chain