一种考虑节点角色的P2P信任模型  

Trust Model for Considering Peer Role in P2P Networks

作　　者：范鑫鑫[1] 李明楚[1] 崔永瑞[1] 赵辉[1] 郭振洲[1] 

机构地区：[1]大连理工大学软件学院,辽宁大连116620

出　　处：《小型微型计算机系统》2012年第5期1000-1005,共6页Journal of Chinese Computer Systems

基　　金：国家"九七三"重点基础研究发展计划基金项目(2007CB714205)资助;国家自然科学基金项目(90715037)资助;高等学校博士学科点基金项目(200801410028)资助;重庆自然科学基金项目(2007BA2024)资助;研究生创新人才培养专项项目资助

摘　　要：在对等网络中,如何对节点行为进行准确的评估是信任模型研究的重点.经过学习和分析,发现现有的模型几乎都是基于节点作为被推荐者这一角色,而忽略了自身的推荐角色.对此本文提出两重推荐信任模型,从节点的两重角色考虑,为每个节点设计两重评估标准.若干次交易后,该模型能够使正常节点形成紧密的交易关系,有效地遏制了恶意节点的交易行为.实验表明该模型在面对夸大、合谋、伪装和单一行为威胁时较其他一些模型更具有效性.In peer-to-peer network,the key research issue lies in how to accurately assess the transaction behavior.Studying and analyzing the existing trust models,we find that each peer′s reputation almost depends on others′ trust ratings as the recommended target,but ignores the self recommendation behavior as recommending individual.Considering these faults,we propose a new dual-recommendation-based trust model DRtrust in view of dual transaction roles.According to these two roles,we design dual-reputation evaluation criterions to reflect their different transaction behaviors for each peer.After a certain number of transactions,our trust model makes those normal peers form a strongly interrelated transaction relation,which confines the transaction behavior of malicious peers effectively.Experimental results also show that our trust model can achieve better against the threats of exaggeration,collusion,disguise and single-behavior compared with other trust models.

关 键 词：对等网络 信任模型 节点角色 两重推荐 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]