计算机应用

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DrTrust: 一种非结构化P2P网络信任模型

张云昌 陈建新 陈珊珊   

  1. 南京邮电大学计算机学院 南京邮电大学计算机学院 南京邮电大学计算机学院
  • 收稿日期:2008-08-19 修回日期:1900-01-01 发布日期:2009-04-22 出版日期:2009-02-01
  • 通讯作者: 张云昌

DrTrust: A trust model in unstructured P2P network

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  • Received:2008-08-19 Revised:1900-01-01 Online:2009-04-22 Published:2009-02-01
  • Contact: Yun-Chang ZHANG

摘要: P2P网络的动态性、匿名性和自治性带来许多安全问题,传统的结构化的P2P信任模型并不能很好的适应对等网络环境。提出了一种应用于非结构化P2P网络中的信任模型——DrTrust。该模型充分利用直接信任值和推荐信任值相结合方式的优点,实现了精确计算信任值,并采用分布式存储方式和激励、惩罚机制分别存储和更新信任值。仿真结果表明,DrTrust在准确计算节点信任值和抑制恶意节点行为等问题上较已有的信任模型有一定的改进。

关键词: 非结构化, P2P网络, 信任模型, 激励机制, 惩罚机制

Abstract: The dynamics, autonomy and anonymity of the P2P network cause many security problems. The traditional trust model in structured P2P network can not satisfy the P2P environment commendably. In this paper, a trust model named DrTrust in unstructured P2P network was proposed, which was based on direct and recommended trust scheme. It takes advantage of the combination of the direct trust and recommended trust to calculate the trust accurately, using distributed way to store trust value and incentive and punishment mechanism to update trust value. The experimental results prove that DrTrust outperforms the current trust models in accurate trust computation and the inhibition to the malicious peers.

Key words: unstructured, P2P network, trust model, incentive mechanism, punishment mechanism