High Secure, Low-Cost RFID System Study And Tag Baseband Design

First of all, this paper introduces the basic knowledge of RFID (Radio Frequency Identification) and discusses security and cost, the two main limit factors of the further development of RFID. Then we present existing various methods which can enhanced RFID security and analyzes the disadvantages of these methods.In this paper, we propose a new improved RFID structure. This structure has two advantages: high security and low cost, so the two limit factors of RFID system could be solved. Then we analyze and verify the security and performance efficiency of the structure, and compare the structure with other security-enhanced RFID structures. The result proves the advantages of we proposed RFID structure.Based on the new high security and low-cost RFID structure, we put forward a new improved UHF (Ultra High Frequency) RFID protocol. The protocol was created by integrating the new RFID structure and abroad prevalent UHF RFID protocol EPC Gen2. RFID system which designed by the protocol will have very high security and low cost. We compare the new improved protocol with protocol EPC Gen2 and other RFID protocols which change from EPC Gen2, the result proves the advantages of the new improved RFID protocol.We have designed a high security and low-cost RFID tag baseband by employing the new improved protocol. RFID tag which use the designed baseband sends only random number, tag category code and the hashed tag ID number to the reader, thus even if the communication data are intercepted, the adversary cannot retrieve any useful information. We simplify the tag baseband based on the characteristic of the new RFID structure. Various hardware reduction techniques are used in our baseband implementation. So the baseband we designed need fewer hardware resources than other security-enhanced RFID tag baseband. Our design is implemented in an Altera FPGA. The experiments show that our baseband design not only achieves high-level security but also takes less logic gates than other similar designs.