关键词: 物联网, 伪随机函数, 射频识别, 标签标识符

Abstract: Aiming at the problems of security defects and low authentication efficiency in existing RFID security protocols, an improved RFID bi-directional authentication protocol based on PRF is proposed. Encrypting the random numbers generated by the reader solves the existing security risks of the protocol. Using random numbers keeps the information of the label fresh. Compared with the existing security authentication protocol, the result shows that the improved protocol not only has the characteristics of anti-tracking, anti-violent crack and anti-replay attack, but also ensures that the tag does not greatly increase the calculation.

Key words: Internet of Things（IoT）, Pseudo-Random Function（PRF）, Radio Frequency Identification（RFID）, tag’s ID