Dynamic Role-Based Access Control for Web services using context and trust

Currently, the security issues of Web services are hot area in information system (IS). This research mainly discusses the key technologies of information access control focusing on following works: After analyzing the dynamic characteristic of application nature for Web services, a Dynamic Role-Based Access Control using Context and Trust model (abbreviated as CT-DRBAC) for Web services is proposed. During Web services, both the subject of invoking request and object of providing service resources are dynamic nature. So, access policies are needed to consider the dynamic nature. The proposed model has been developed and the authorization framework is discussed detail. In order to implement the dynamic trust management mechanism, a dynamic user role authorization algorithm which considers the user lifecycle contexts in the open systems is proposed and designed to meet the dynamic characteristic of subject and object effectively, and achieve intelligent and scientific user role assignments. The proposed access control module can be used in intelligent information systems to grant dynamically roles to users according to the current context.