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宽带无线系统802．16是一个目前人们十分关注的无线通信系统。分析了它的安全机制,从协议栈的安全加密 子层着手,分析了用户站向基地站认证过程,认证之后的会话密钥交换过程以及获取会话密钥之后的数据加 密方式。在分析完以上的过程后,指出802．16标准存在一定的安全漏洞,包括了目前只有单向认证、会话密 钥和认证密钥安全性不够以及数据的加密方式安全性也很薄弱等。提出了一些可能的改进方式。最后和 802．11无线局域网的安全性作了一些比较。
Broadband wireless system 802.16 is a wireless communication system that people pay close attention to at present. The security mechanism of the protocol stack is analyzed. Starting from the security sub-layer of the protocol stack, the authentication process of the user station to the base station, session key exchange after authentication, and data encryption after obtaining the session key are analyzed. After analyzing the above process, it is pointed out that there are some security loopholes in the 802.16 standard, including that only unidirectional authentication, insufficient session key and authentication key security, and data encryption are also weak in security. Proposed some possible improvements. The final and 802.11 wireless LAN security made some comparison.