Decentralized access control scheme for the dynamic group

ully decentralized access control scheme for the dynamic group is proposed in this paper. The scheme uses the two layers of fully decentralized access control mechanism to provide security services such as joining the group, accessing group resources. One layer control is to prevent unauthorized members from joining a group. Another layer control is to trace the behavior of group members, to rate their trust values, and to revoke malicious members from group once detected. Furthermore, the scheme requires no central-trusted authority and a few interactions among group members, so it is a fully decentralized control, more efficient, and more practical scheme in the environments of dynamic membership and there is no central-trusted authority.