无线局域网在给人们的日常生活带来便利的同时，也增加了通信的不安全性。为了克服 WEP 协议固有弱点给无线网络带来的诸多安全性隐患，Wi-Fi联盟提出了WPA/WPA2协议来替代WEP协议。本文主要对WEP、WPA/WPA2两种无线局域网通信协议加密过程进行了研究，并从数据加密、数据完整性、身份认证等方面详细分析了 WPA/WPA2协议所做出的改进。最后文章还对WPA/WPA2的攻击方式做了简单介绍。%Wireless local area network not only brings convenience to people’s daily life, but also makes people’s com-munication less security at the same time. In order to overcome so many security risks because of WEP protocol inherent weakness, Wi-Fi alliance proposed WPA/WPA2 protocol to replace WEP protocol. This paper mainly introduces the encryp-tion process of WEP, WPA/WPA2 two wireless local area network communication protocols, and introduces the improve-ment made by WPA/WPA2 protocol from the data encryption, data integrity, and authentication. Finally the paper introduce the methods of attack to WPA/WPA2.
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