基于码分多址防碰撞的射频识别认证协议  

Radio Frequency Identification Authentication Protocol Based on CDMA Anti-collision Algorithm

作　　者：王云峰[1] 张斌[1] 刘洋[1] 费晓飞[1] 

机构地区：[1]解放军信息工程大学,郑州450001

出　　处：《电子与信息学报》2014年第6期1472-1477,共6页Journal of Electronics & Information Technology

摘　　要：该文针对射频识别(RFID)领域中的安全认证协议和多标签防碰撞算法两个研究热点,设计了一种基于码分多址防碰撞算法的RFID安全认证协议。协议支持密钥的动态更新并引入标志位机制选择备用密钥来抵御数据库同步攻击,同时结合码分多址技术,应用重传随机数进行扩频码的选择,实现一次重传解决多标签识别中因数据碰撞造成的标签不识别的问题。首先,描述协议的流程及防碰撞原理;其次,应用SVO逻辑对认证协议的正确性进行证明;最后,对应用该认证协议的系统吞吐效率进行数值分析,分析表明其吞吐效率高于传统防碰撞算法。For addressing the two focus issues under research , security authentication protocol and the multi-tag anti-collision algorithm in the field of Radio Frequency IDentification （RFID）, a Code Division Multiple Access （CDMA）-based anti-collision algorithm of the RFID authentication protocol is presented in this paper. The authentication protocol supports dynamic updates of the key and resists database synchronization attacks by using flag mechanism to select spare key. Meanwhile, by combining with CDMA and by retransmitting random number to select spreading code, the authentication protocol solves recognition of tags due to data collisions during the multi-tag identification by one-time retransmission. Firstly, the process of the authentication protocol and an anti-collision theory is described. Secondly, the SVO logic is used to prove correctness of the protocol in theory. Finally, numerical analysis of the system throughput applying the protocol shows that its throughput efficiency is higher than the traditional one.

关 键 词：射频识别 码分多址 认证协议 防碰撞 

分 类 号：TN91[电子电信—通信与信息系统]