The Radio Frequency Identification tag with the function of anti-collision and anti-counterfeiting

Anti-collision in RFID will occur when multiple tags or readers transmit data simultaneously, and these data will affect each other and cannot be recognized. While anti-counterfeiting in RFID occurs when a duplicated tag is used in the goods, and the reader will not be able to discover that it is a fake tag. Anti-collision and anti-counterfeiting mechanisms are usually operated separately in the past, but they may have to perform at the same time in some cases. For example, when RFID-based exhibition tickets are used for entrance purpose both mechanisms will be needed simultaneously. To counter forgery attack, it is important that we have to meet not only anti-collision but also anti-counterfeiting requirement. Therefore, in this paper, we propose a suitable communication protocol of RFID tag with the function of anticollision and anti-counterfeiting called A Combined Active RFID Tag Collision Resolution Protocol Against Counterfeiting (CRPAC). In our proposed 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 active tags.