IEEE 802.11安全架构的网络性能分析

Performance Analysis of IEEE 802.11 Security Architectures

在无线局域网中引入安全机制常造成性能下降,其中部分原因决定于对加密、认证、密钥更新和数字证书等安全选项的设置.IEEE 802.11i(WPA2)及其在新硬件平台上的实现已显著地改善了性能问题.本文对IEEE 802.11i进行性能分析,并将结论与WEP、WPA的研究进行比较.研究显示安全选项虽本质上有差异,但实践中对性能影响的差异却很小,甚至忽略不计.分析结论,为有性能要求的安全无线网络的设计提供参考.

Introduction of security in Wireless LANs had always created degradation in performance-depending in part upon the options chosen for encryption, authentication, re-keying and digital certificates. The finalisation of IEEE 802. 11i （WPA2） along with its implementation in new hardware platforms has significantly altered such performance characteristics. This paper describes the performance analysis of IEEE 802. 11i and compares the results with studies based on WEP and WPA. This research shows that while there are statistically significant differences between the security options, they are small enough to be ignored in practice. This paper provides an analysis which will assist in secure wireless network design which meets specific performance criteria.