基于Hash函数的RFID认证协议安全性改进

Security Improvement of RFID Authentication Protocol Based on Hash Function

RFID系统目前已经得到了越来越广泛的应用,其安全性问题也越来越受到人们的重视。本文对目前常用的基于Hash函数的三种认证协议进行分析,讨论其各自的优点及不足,并对Hash函数自身存在的Hash值冲突问题进行研究。提出一种基于Hash函数的改进RFID认证协议,引入两个不同的Hash函数模块解决Hash值冲突问题。同时对认证协议中的明文传送电子标签ID存在的隐患进行改进,将ID与随机数相结合并进行Hash变换后传输。经过对比分析,改进后的认证协议对RFID系统的安全性有了很大的增强。

RFID system has been used widely,its security issue is also more and more important. In this paper,we analysis thethree kinds of authentication protocols current commonly used based on Hash function,analyze their respective strengths and weak-nesses,and research the Hash value conflict of itself. We propose an improved RFID authentication protocol based on Hash function,introduce two different modules of Hash function to resolve the Hash value conflict. At the same time,we improve the security riskof transmitting tag ID in the clear-text,combine The ID with the random number and make Hash transform to Transmit. Throughcomparative analysis,the improved authentication protocol has enhanced the security of RFID system greatly.