关键词: 字合成运算, 密钥生成, 随机数, 射频识别, 交叉位运算, 标签标识符

Abstract: To solve the security problem which is caused by the pre-set shared private key between the tag and the reader, a shared private key wireless generation algorithm based on bit operation is proposed. This algorithm uses the method of wirelessly generating the private key, encrypts the random number that is generated by the reader and the tag through the bit operation function, and finally dynamically generates the shared private key between the both, so that the shared key cannot be pre-set. The comprehensive performance and security analyses show that the algorithm not only can ensure that the computational complexity of the tag and the reader is equivalent to the original algorithm, but also can solve the security problem existing in the original algorithm.

Key words: Syn, key generation, random number, Radio Frequency Identification（RFID）, Cro, Tag’s ID