无线局域网TKIP协议的安全分析

The Security Analysis for WLAN TKIP Protocol

通过建立数学模型的方法对TKIP(temporalkeyintegrityprotocol)进行量化的安全分析,推导出TKIP协议内各模块与整个协议安全性能的对应函数关系,特别着重分析了iv空间与安全强度间的关系.根据分析得出TKIP协议虽然提高原有WEP(wiredequivalentprivacy)的安全性能,但其安全强度并没有预想的高.

As an expansion of LAN, the WLAN reduces the cost of building a network infrastructure and enables the users to enjoy the mobile services. The 802.11 standard includes a wired equivalent privacy (WEP) protocol, which is used to protect communications from eaves dropping. Several serious security flaws in this protocol have been discovered. To cope with this problem, IEEE802.11i Group proposed adapting TKIP protocol to enhance the WLAN security. In this paper, through analyzing TKIP protocol, concrete security analyses of TKIP protocol are made. It was shown that although TKIP did indeed increase security and result in significant, provable security gains, but it still failed to meet the need of users in a WLAN environment.