How to solve collision and authentication issues using RFID protocol technology

RFID tags are a powerful mechanism for object identification and can facilitate the compilation of detailed object histories and pedigrees. Since RFID tags communicate with the reader through open air in an automated, wireless manner, they are poor authenticators. The real life RFID application issues include poor-authentication, counterfeit and collision. Therefore, in this paper we focus on passive and active RFID collision problems with authentication and counterfeit. We propose a new protocol called CRPA to make anti-collision protocol and authentication protocol working together for passive RFID tags. Previously, we have proposed a suitable communication protocol with the function of anti-collision and anti-counterfeiting called CRPAC for active RFID tags. In this CRPA scheme, when the anti-collision mechanism is in progress, the anti-counterfeiting scheme is working along with it. Eventually, the new scheme effectively reduces the workload of RFID system and significantly decreases collision probability of the passive tags. The proposed CRPA protocol is especially applicable to multiple tags scenario that requires anti-collision and authentication.