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A Secure and Efficient Searching Scheme for Trusted Nodes in a Peer-to-Peer Network

機(jī)譯：對(duì)等網(wǎng)絡(luò)中可信節(jié)點(diǎn)的安全高效搜索方案

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The existing search mechanisms for peer-to-peer (P2P) networks have several problems such as take content distribution, free riding, whitewashing and poor search scalability. Although, researchers have proposed several trust management and semantic community-based mechanisms for combating free riding and distribution of malicious contents, most of these schemes lack scalability due to their high computational, communication and storage overhead. This paper presents a trust management scheme for P2P networks that utilizes topology adaptation by constructing an overlay of trusted peers where the neighbors are selected based on their trust ratings and content similarities. It also increases the search efficiency by taking advantage of the implicit semantic community structures formed as a result of topology adaptation since most of the queries are resolved within the community of trustworthy peers. Simulation results demonstrate that the proposed scheme provides efficient searching to good peers while penalizing the malicious peers by increasing their search times.
機(jī)譯：對(duì)等（P2P）網(wǎng)絡(luò)的現(xiàn)有搜索機(jī)制存在一些問題，例如內(nèi)容分發(fā)，搭便車，粉飾和搜索擴(kuò)展性差。盡管研究人員提出了幾種基于信任管理和基于語義社區(qū)的機(jī)制來對(duì)抗惡意內(nèi)容的隨意搭乘和分發(fā)，但是由于其高計(jì)算，通信和存儲(chǔ)開銷，這些方案大多數(shù)都缺乏可伸縮性。本文提出了一種用于P2P網(wǎng)絡(luò)的信任管理方案，該方案通過構(gòu)建信任對(duì)等方的覆蓋圖來利用拓?fù)溥m應(yīng)，在該對(duì)等方中，根據(jù)鄰居的信任等級(jí)和內(nèi)容相似性選擇鄰居。由于大多數(shù)查詢都是在可信任對(duì)等體的社區(qū)中解決的，因此它還利用了由于拓?fù)溥m應(yīng)而形成的隱式語義社區(qū)結(jié)構(gòu)，從而提高了搜索效率。仿真結(jié)果表明，所提出的方案可以為良好的對(duì)等體提供有效的搜索，同時(shí)通過增加惡意對(duì)等體的搜索時(shí)間來懲罰它們。

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