使用虚拟参与人和博弈论的P2P网络信用系统模型  

A Reputation System for Peer-to-Peer Networks Using Game Theory and Virtual Player

作　　者：曾明霏[1] 余顺争[1] 

机构地区：[1]中山大学信息科学与技术学院,广州510006

出　　处：《小型微型计算机系统》2014年第6期1309-1314,共6页Journal of Chinese Computer Systems

基　　金：国家"八六三"高技术研究发展计划项目(2007AA01Z449)资助;国家自然科学基金面上项目(60970146)资助

摘　　要：在博弈论的基础上建立一种自我激励的信用系统模型.该模型将整个P2P系统构造成为一个虚拟参与人,让虚拟参与人和普通节点为了自身的最优利益进行博弈,由此得出一个可以满足系统和节点双方利益的博弈均衡,并在此均衡的基础上建立信用系统.在模型中定义了一个贴现因子用于描述节点的贪婪程度,P2P网络中的所有节点都统一描述为贪婪程度不同的理性节点.仿真结果说明该信用系统可以通过节点的私利性激励普通节点为其他节点提供服务.This paper proposes a self-incentive reputation system model based on the game theory. In the model, the P2P system is taken as a virtual player. An ordinary player always games with the virtual player, both of which aims for their own best benefits and make equilibrium in the game. The reputation system is based on this equilibrium. The model defines a discount factor for evaluating the free-riding users＇ greedy level. The peers in the P2P network are the rational peers with different discount factor. The simulation results show that the model can incent the peers to serve others for their benefits.

关 键 词：对等网络 信用系统 博弈论 虚拟参与人 贴现因子 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]