Abstract: Focusing on the information security and implementation of RFID systems, this paper analyzed the chaotic dynamics of the linear feedback shift register and the piecewise Logistic mapping, then presented a RFID encryption algorithm combined with chaotic dynamical disturbance. The information was encrypted by the key generated by chaotic sequence generator before being transmitted, then the ciphertext feedback and dynamical disturbance would generate the next key. The analysis and simulation shows that the algorithm is safe, easy to be implemented and so on.

Key words: Radio Frequency IDentification (RFID), linear feedback shift register, chaos, disturbance, electronic tag

摘要： 针对目前无线射频识别(RFID)系统通信时存在的信息安全问题以及实现问题，分析了线性反馈移位寄存器与分段Logistic映射的混沌动力学特性，提出了一种结合混沌动态扰动的RFID加密算法。混沌序列发生器产生的密钥流将阅读器与电子标签的信息进行加密后再传输，然后通过密文反馈和动态加扰生成下一轮密钥。理论分析和仿真结果表明该算法具有安全性高、加密速度快、易于实现等优点。

关键词: 无线射频识别, 线性反馈移位寄存器, 混沌, 扰动, 电子标签