【摘要】 随着Internet的迅速普及,文档共享成为一种最常见的协作方式。这种文档共享的特点是:用户的权限随着协同工作的进行而变化且用户作为文档的共享者对文档的授权具有很高的自主性,因此RBAC模型不能满足其访问控制的需求。文章在RBAC的基础上提出基于事务的文档共享访问控制模型,对事务进行了讨论和定义,重点研究了基于事务的访问授权策略,并给出了模型的形式化定义。更多还原

【Abstract】 With the development of Internet, document sharing becomes the popular collaboration mode. In the document sharing as collaboration, the privilege authored to the users changes with the process of collaboration and as the owner of the sharing document the users has high autonomy in the authorization on the document, So its access control cannot use RBAC directly. In this paper, we define a transaction-based access control model for document sharing, which made the authorization more flexible and convenient. In this article, we discuss and define the transaction, focus on the transaction-based access authorization policy, and give the formalization of the access mode.更多还原