关键词: 信任管理, 基于信任度的访问控制, 信任自主传播, 信任关系发现, 信任追溯

Abstract: Trust management is a new kind of access control method which is dynamic and scalable. Based on the present trust management research and the trust-based interactive mechanism of human society, this paper submits a trust degree based access control model, and mainly probes into the problems of trust delegation and trust relation discovery. Based on the trust propagating model of human society and the self-organization theory, the paper proposes a self-organized trust delegation model, which can achieve dynamic and extensive trust propagation. By referring to the idea of the distributed routing algorithms in computer networks, it puts forward a distributed trust tracing algorithm, whose time complexity is O(k) (k is the number of entities in the trust relations). The algorithm promi-nently proves the efficiency of trust relation discovery compared with other algorithms.

Key words: trust management, trust degree based access control, self-organized trust delegation, trust relation discovery, trust tracing