无线局域网中一种快速安全的切换方法  

Fast secure handoff scheme for wireless LANs

作　　者：杨卫东[1] 马建峰[1] 杨超[1] 

机构地区：[1]西安电子科技大学计算机网络与信息安全教育部重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2008年第3期474-477,522,共5页Journal of Xidian University

基　　金：国家自然科学基金重大研究计划资助(60633020);国家自然科学基金资助(60573036)

摘　　要：根据无线局域网中实时多媒体业务低切换时延的需求,提出了一种基于移动预测的快速安全切换机制.利用终端移动模式和切换位置从邻居图中选择部分信道以单播方式扫描,降低了扫描时延.进一步通过在扫描阶段提前计算临时会话密钥及加入消息认证码,保证了扫描过程的安全性,并减小重认证时延.仿真结果表明本方法的切换时延比其他方法减小35%以上.According to the requirements for real-time multimedia services in Wireless LANs, a fast secure handoff scheme based on mobility prediction is proposed. By using the stations＇ mobility patterns and handoff location, a station is only scanned with unicast channels selected by neighbor graphs, which reduces the scanning delay. Furthermore, the pairwise transient key is computed in advance and message integrity code is piggybacked in probing massages, which satisfies desirable security attributes and reduces the re-authentication delay. Simulation results show that compared with the other scheme, the hardoff delays reduce by more than 35%.

关 键 词：切换机制 移动预测 AP邻居图 密钥预分发 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]