网络应用的分布式特点对其涉及的身份认证模型提出了分布式的需求,SDSI 规范的 提出,为这种需求提供了支持。本文在分析SDSI 规范的基础上,引人了基于角色的信任传递模型,方便了资源使用者方便、匿名地访问资源,同时也减轻了资源控制方对数量巨大且动态变化的用户群的管理负担。 关键词:SDSI;角色;信任传递 Abstract: The distributed network applications have new demands for distributed identity authentication,and SDSI specification provides some support for this.This paper describes a model of trust transfer between roles based on SDSI specification, which helps the users to visit resources expediently and anonymously, and at the same time ,releases the burdens of the resource manager when meeting a huge and inconstantly user population. Key words:SDSI;role;credit transfer