混合P2P环境下有效的访问控制机制

由于P2P网络无中心控制节点,节点呈现自治特性和高度动态特性,使得传统的获取控制机制在对等计算网络中不再适用.据此,提出了混合P2P计算环境下基于角色和信任的获取控制方法.在由超级节点与叶节点组成的协作域中采用基于角色的获取控制机制,在协作域之间采用基于信任的获取控制机制,形成可信的协同环境.与现有方法相比,该方法是细粒度的、基于内容的,并且考虑了节点的可信度差异,能够很好地应用于混合P2P计算环境.

Efficient Access Control in Hyprid Peer-to-Peer Environments

One of key requirements for the control mechanism in P2P systems is access control which becomes more critical when peers enter into or leave a collaboration community.However,the convential access control mechanism is not suitable because the P2P system is a decentralized and dynamic one.An approach is thus proposed for providing an efficient access control mechanism in hybrid P2P environments,i.e.,it supports the role-based access control mechanism in a collaboration community comprising both leaf peers and super peers in hybrid P2P networks.Furthermore,to support access control among different communities,a trust-based access control mechanism is proposed so as to form a trustful cooperating environment.Compared to other existing approaches,the proposed one is content-based and fine-grained with the trust differences between peers taken into account,so highly applicable to hybrid P2P computing environments.