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This paper proposes an improved two-way security authentication protocol to improve the security level of Radio Frequency Identification (RFID) system. In the proposed protocol, tags calculate hash value, which is divided into two parts. The left half is used to verify the identity of the tags, and the right half is used to verify the identity of the reader, which will reduce the tag’s computation and storage. By updating the tag’s secret key value and random number, the protocol can prevent most attacks existing in RFID systems such as data privacy, replay attack, fake attack, position tracking and asynchronous attack. The correctness of the protocol is proved by using Burrows-Abadi-Needham (BAN) logic analysis. The evaluation results show that the scalability of the protocol proposed is achieved with acceptable response time limits. The simulation results indicate that the protocol has significant advantages on performance efficiency for many tags, which provides a reliable approach for RFID system application in practice.

An Improved Two-Way Security Authentication Protocol for RFID System