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Trust Management in Peer-to-Peer Networks

机译：对等网络中的信任管理

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In recent years, various applications of Peer-to-Peer (P2P) computing have been widely used because of its unique advantages, which have played an important role in commerce, communications and other fields. The P2P system is essentially a distributed system, without central servers. Each peer is both client and server, who have the same status. However, some features of P2P networks, such as autonomy, dynamic, and heterogeneity lead to an important problem, namely unreliable quality of service. Unreliable quality of service is usually presented as providing false or unreliable service, impacting customer satisfaction. The establishment of trust models which evaluates capabilities of peers can measure the service capacity of a peer, and identify malicious behavior, thereby reducing the risk of interaction and being an effective technique to ensure the overall availability of P2P networks. A trust model named METrust in P2P networks based on the recommendation is proposed. In METrust, a peer selects recommendation peers whose evaluation criteria are similar, and evaluation criteria of peers are determined through the AHP method (Analytic Hierarchy Process). Each peer in the network has a unique credibility of recommendation, and two trust parameters for updating the credibility of recommendation are introduced, namely updating range and updating strength. METrust proposes algorithms to compute the trust of peers. Simulations show that, the trust model METrust can identify malicious peers, and improve the quality of service in P2P networks effectively.
机译：近年来，对等（P2P）计算的各种应用由于其独特的优势而被广泛使用，在商业，通信和其他领域中发挥了重要作用。 P2P系统本质上是一个没有中央服务器的分布式系统。每个对等体都是客户端和服务器，它们具有相同的状态。但是，P2P网络的某些功能（例如自治性，动态性和异构性）导致一个重要问题，即服务质量不可靠。服务质量不可靠通常表示为提供虚假或不可靠的服务，从而影响客户满意度。建立评估对等方能力的信任模型可以衡量对等方的服务能力，并识别恶意行为，从而降低交互风险，并且是确保P2P网络整体可用性的有效技术。提出了一种基于该建议的P2P网络信任模型METrust。在METrust中，对等方选择评估标准相似的推荐对等方，并通过AHP方法（层次分析法）确定对等方的评估标准。网络中的每个对等方都具有唯一的推荐可信度，并引入了两个用于更新推荐可信度的信任参数，即更新范围和更新强度。 METrust提出了计算对等方信任度的算法。仿真表明，信任模型METrust可以识别恶意节点，并有效地提高P2P网络中的服务质量。

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