中文摘要：

随着企业信息化进程的推进,企业业务系统不断地增加.陆续加入的业务系统往往采用不同实现技术和安全策略,并且各自维护独立的认证授权体系,这样很容易形成＂信息孤岛＂.为消除这种系统访问控制孤立,基于统一认证的单点登录（SingleSignOn）系统应运而生.然而,现有的单点登录模型在安全性、扩展性、可维护性等方面都存在诸多不足.本文基于安全断言标记语言SAML,设计了一个安全性高、互操作性好、松耦合的的统一认证单点登录框架,主要包括身份提供者过滤器和服务提供者过滤器模块、单点登录交互协议和安全保障机制.

英文摘要：

With the development of enterprise informationization, the enterprise business system continually increases. The added business systems often use different technologies and security policies, and maintain separate authentication and authorization system, thus it is easy to form ＂islands of information＂. Unified authentication based single sign on technique emerges at the right moment for eliminating such isolating access control. However, there are some disadvantages on the security, scalability and maintainability of existing single sign-on models. In this paper, based on the Security Assertion Markup Language（SAML）, a unified authentication single sign-on framework with high security, interoperability, and loosely coupling is designed and implemented, which includes the identity providers filter（SSO-IDP） and service providers filter（SSO-SP） modules, single sign-on interaction protocol and security mechanisms.