有线等价私密算法的安全性能分析与改进  

Security Analysis and Improvement of Wired Equivalent Privacy

作　　者：严宏[1] 何晨[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《上海交通大学学报》2004年第5期693-696,700,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(60372076);国家高技术研究发展计划(863)项目(2002AA144110)

摘　　要：在深入分析IEEE802.11标准有线等价私密(WEP)算法安全漏洞的基础上,提出了在原有WEP算法中引入逐帧更新的加密密钥和Michael密钥的有效改进方法.分析和仿真结果表明,该方法能够排除WEP算法的安全隐患,提高无线局域网的数据安全性能.The essential causes of wired equivalent privacy (WEP) vulnerability in standard 802.11 for wireless LAN were analyzed. Based on it, an efficient improvement was proposed, which introduces synchronized per-packet encryption keys and Michael keys into the original WEP algorithm. The analysis and simulation show that this improvement can correct the design flaws of WEP stated in some previous papers and promote significantly the security performance of wireless LAN.

关 键 词：无线局域网 有线等价私密算法 RC4流加密算法 密钥更新 

分 类 号：TN918.91[电子电信—通信与信息系统]