This thesis analyzes the characters of Internet/Intranet, studies a lot of authentication mechanism, brings forward a single sign-on model based on cookie in web, and implements the system prototype.

• 本文认真分析了Internet/Intranet环境的特点,并研究了大量的认证机制,最终提出了一个WEB环境下基于Cookie的单点登录模型,并实现了系统原型。