| 一种新的P2P系统中基于双ratings的声誉管理机制 |
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| 引用本文： | 金瑜,古志民,班志杰.一种新的P2P系统中基于双ratings的声誉管理机制[J].计算机研究与发展,2008,45(6):942-950. |
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| 作者姓名： | 金瑜 古志民 班志杰 |
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| 作者单位： | 北京理工大学计算机科学技术学院,北京,100081 |
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| 基金项目： | 北京理工大学校科研和教改项目 |
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| 摘 要： | 声誉系统的效率取决于回馈的质量,现有P2P系统中的声誉模型不能处理合谋、不递交ratings等攻击,并且对无过失节点还存在不公平性,针对这些问题,提出了一个新的基于双ratings的声誉管理机制,采用两个度量来评价节点:服务信任和回馈信任,服务信任反映server提供服务的可靠性;回馈信任反映consumer汇报ratings的可信度.一次交易后,要求服务双方都递交ratings,依据这两个ratings对server的服务信任和consumer的回馈信任进行更新,并且server的服务信任更新与consumer的回馈信任紧密相关.为了防止恶意节点反复实施恶意行为或不递交rating,还提出了一个惩罚机制,作为对声誉模型的补充,仿真表明,提出的声誉管理机制能够抵制上述恶意攻击,减少不公平性.
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| 关 键 词： | P2P系统 信任 声誉 双ratings 安全 |
| 修稿时间： | 2007年5月8日 |
A New Reputation Management Mechanism Based on Bi-Ratings in Peer-to-Peer Systems |
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| Jin Yu,Gu Zhimin,Ban Zhijie.A New Reputation Management Mechanism Based on Bi-Ratings in Peer-to-Peer Systems[J].Journal of Computer Research and Development,2008,45(6):942-950. |
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| Authors: | Jin Yu Gu Zhimin Ban Zhijie |
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| Affiliation: | Jin Yu,Gu Zhimin,, Ban Zhijie(School of Computer Science , Technology,Beijing Institute of Technology,Beijing 100081) |
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| Abstract: | The efficiency of reputation system depends on the quality of feedbacks. However current reputation models in peer-to-peer systems can not process such strategic feedbacks as collusive ratings or no ratings attacks. Also there is unfairness for the blameless peers in these models. Pointing to these problems, a new reputation management mechanism is proposed. In this mechanism there are two metrics used to evaluate peers: feedback and service trust. Service trust shows the service reliability of peers. Feedb... |
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| Keywords: | peer-to-peer system trust reputation two ratings security |
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