安全无线局域网增强媒体接入控制功能的关键技术及实现

Key technique and design of enhanced medium access control of SWLAN

在深入研究IEEE 80 2 1 1标准和无线局域网有关安全协议的基础上提出了改进的安全无线局域网 (SWLAN)模型 ,及其基于嵌入式硬件系统的实现方案 .SWLAN采用新的接入控制方法 ,通过在MAC(mediumaccesscontrol)层增加了改进的基于IEEE 80 2 1x的认证机制以及基于TKIP(temporalkeyintegrityprotocol)和AES(advancedencryptionstandard)的加密机制 ,增强了MAC层的安全控制功能 ,从而提高了无线局域网的安全性 .本文着重分析了SWLAN的核心设备接入点 (AP)的功能结构与关键技术 ,以及MAC层的设计方法和实现方案 ,对整个无线局域网安全系统的实现具有重要的意义 .

The paper proposes a module of secure wireless local area network (SWLAN) based on protocol of IEEE 802.11 and other protocols of security, and its implementation way based on embedded system. SWLAN adopts a new way of access control and enhances the security performance of medium access control (MAC) layer by adding improved authentication based on IEEE 802.1 x and encryption based on temporal key integrity protocol (TKIP) and advanced encryption standard (AES). The structure and key technique of access point (AP) which is the key part of SWLAN are analyzed. The design and implementation of MAC layer are also proposed which are important in the integrated SWLAN system.