关键词: 访问控制 上下文 角色 移动代理

Abstract:

Despite the recent development in access control approaches, amongst them are the lack of context-aware models for access control, and the reliance on  identity or capability-based access control schemes. With the development of networking and distributed computing, dynamic authorization through the se curity context must be enforced to cope with the distributed, heterogeneous and dynamic nature of these environments. In this paper, we present an acces s control scheme that can resolve these issues, and propose a dynamic context-aware access control model （DCAAC） which extends RBAC with context const  traints. The DCAAC dynamically grants and adapts permissions to users based on a set of contextual information collected from the system and users＇ env  vironments, while retaining the advantages of the RBAC model. A DCAAC model is implemented in our grid computing experiment.

Key words: （access control, context, role, mobile agent）