关键词: 无线射频识别（RFID）, 认证协议, Hash函数, 去同步化

Abstract: The security authentication protocol is an important means to solve the problem of the forward channel security and identity recognition of the RFID system. Aiming at the low efficiency of label retrieval and privacy leakage problem in common protocols, an anti-desynchronization and efficient RFID mutual authentication protocol is proposed. Using the unidirectional and randomness of Hash function based on Sponge structureto achieves mutual authentication and ensures the freshness of the protocol. The asymmetrically encrypted public key is used to pre-encrypt the ID value and the secret value is processed to effectively resist replay attacks. The protocol can effectively resist desynchronization attack by using update mechanism. The decrypted ID is used as index value to improve the retrieval efficiency of the backend database. Setting up the flag can effectively filter the repeated computation without the synchronization attack condition. Compared with the existing protocols, the simulation results show that the protocol has higher authentication efficiency.

Key words: Radio Frequency Identification（RFID）, authentication protocol, Hash function, desynchronization