中文摘要：

安全是无线射频识别技术系统的基础性问题之一。在分析已有方案的基础上,该文提出一个基于安全哈希算法的中量级通信加密协议,结合随机数,采用3次握手加密验证,其间更新密钥和随机数。从实验结果分析得到,该加密协议具有可行性、可靠性、内存占用资源少、信息隐私性和完整性等特点,大大提高无线射频识别系统的安全强度和搜索效率。

英文摘要：

Safety is one of foundation problems in RFID.Based on the analysis of the existed schemes,the paper proposes a new mid-weight encryption communication protocol which uses three times handshake validation.It combines encryption authentication with random number and updates hash key and random number.From the analysis of experimental result,the encryption protocol is feasible,reliable,small memory occupation and high information privacy which greatly increase RFID system security performance and search efficiency.