本文在总结前人对无线局域网的安全问题研究的基础上，对如何通过加强IEEE802.1协议的安全性来加强五项局域网的安全做了细致的探讨，提出了WLAN安全认证和密钥管理的软件方案，实现了包括安全认证，密钥管理，数据保护等功能，支持用户通过认证登陆网络，并有效保证了无线局域网中数据访问的安全行和可靠性。-This paper summarizes previous security issues for wireless local area network based on the study of how to strengthen the IEEE802.1 protocol to strengthen the security of the safety of the five local area network to do a detailed study, presented WLAN security authentication and key management software programs to achieve security, including authentication, key management, data protection and other functions, allows users to access the network through authentication, and wireless local area network effectively guarantee the security of data access and reliability of the line.