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0引言无线局域网能够使用户真正实现随时、随地、随意地接入网络,易于实施、建设成本小、管理代价低、运行灵活、效率高的特点使其在各个领域都得到了越来越广泛的应用。随着大量的智能移动终端接入无线移动网络,移动商务服务和应用获得了巨大的发展。这类服务需要在阻止非法用户获取服务资源的同时,防止合法用户恶意占用、消耗服务资源。在提供服务前对用户的身份进行认证,是一种有效阻止非法用户获取服务资源的手段。
0 Introduction Wireless LAN enables users to truly, anytime, anywhere access to the network, easy to implement, low construction costs, low management costs, flexible operation, high efficiency features in all fields have been more and more widely application. With a large number of smart mobile terminals accessing wireless mobile networks, mobile commerce services and applications have gained tremendous growth. Such services need to prevent illegal users to obtain service resources, while preventing legitimate users malicious occupation, consumption of service resources. Authenticating a user’s identity before providing the service is a means of effectively preventing illegal users from obtaining service resources.