为解决RFID领域中多标签识别存在的信息泄露和信息碰撞问题，提出了一种基于预约机制的防碰撞安全认证协议(reservation mechanism for authentication protocol，RMAP)。RMAP可有效抵御窃听、重放、欺骗等攻击，且采用精简杂凑运算次数的方法，有效地简化了计算量。同时，采用载波监听多点接入技术，通过重传随机数进行帧序号的二次预约和重排，实现标签的无碰撞有序通信和识别效率的最优，解决了现有协议为避免信息碰撞而对标签进行循环性识别导致的识别效率低、读取时间长的问题。对RMAP识别效率的数值分析表明，当待识别标签数量少于1 024时，RMAP的最低识别效率为95。15%，高于常用防碰撞协议。
An Anti-collision Security Authentication Protocol Based on Appointment Mechanism for RFID System
In order to solve problems of information disclosure and information collision existing in multi-tag identification in the RFID field,an anti-collision security authentication protocol based on res-ervation mechanism for RFID system is presented.RMAP(Reservation Mechanism for Authentication Protocol)can resist such attacks as eavesdropping,replay,spoofing and so on,and it utilizes the method of reducing the number of hashing operations and effectively simplifies the computation.At the same time,RMAP gets an optimal recognition efficiency with an orderly communication of all tags such problems as low recognition efficiency and long time reading caused by cyclically identifying tags for avoiding data col-lision with the present protocol are solved.The numerical analysis for recognition efficiency of RMAP show that when the number of tags to be identified is less than 1024,the lowest recognition efficiency of RMAP is 95.15%,which is higher than that of the common anti-collision protocols.
time division multiple accessappointmentanti-collisionauthentication protocol
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