针对已有基于hash运算的RFID认证协议所面临的安全问题,提出了一种新的适合低成本RFID的双向认证协议,并与已有的协议进行安全性分析和性能比较.结果表明该协议仅使用hash函数和异或操作,就达到机密性、完整性和防追踪性的安全目标,并运用时间戳作为标签查询标志,提高认证过程的执行性能.因此该协议与先前工作相比,更适合低成本的RFID系统.%Analysis of existing hash-based RFID authentication protocols' deficiency in security and privacy, this paper proposed an improved two-way authentication protocol for low-cost RFID system, and compared with the existed ones on analysis of security and performance. As only hash function and bitwise XOR operation are required to be computed by tags, and used time stamp for index query to improve the performance of query for tag information stored in database, so the proposed strategy is very suitable for low-cost RFID system compared with previous works.
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