P2P系统的一种自治信任管理模型

A Self-government Model for Peer-to-peer Trust Management

信任管理是P2P系统保证信息安全的重要前提和基础.分布式信任机制被广泛应用于开放系统信任模型的设计,然而,缺乏有效的信任机制来保证参与分布式计算的节点本身的安全性.在仔细分析了P2P系统的信任问题后,为保证节点的安全性提出一种高度自治的P2P环境下的信任管理模型.该模型通过加强节点的自治能力,使每一个节点可以自主地建立一张与它交易的节点的信任表,并通过主观推理方法得到其他间接节点的信任值,提高了网络本身的自适应性,为信任管理研究提供了一种新思路.

Trust management is fundamental for information security in peer to peer network. There are several models which applied distributed method to construct trust between peers, but there is no way to guarantee security of the peer＇s behavior. In this paper, the nature of the trust is considered, and the paper present a highly self-governing trust model for peer to peer network. This model enhances the ability of self-government of peers, for the security of the peers each peer holds a local trust table for those who have exchanged information with it directly, and can determine the other indirect peers trust degree by subjective reasoning method. This improves the open net-work self-adaptability, and gives a new and valuable way for studying trust management in P2P network.