A Novel Distributed Trust Model for Peer- to- Peer Networks
A Novel Distributed Trust Model for Peer- to- Peer Networks
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发表时间：
2014-11
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通讯作者：
Salma Shaik;S. John
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作者：
Salma Shaik;S. John
点对点（P2P）网络是自配置的网络，很少或没有中央控制。P2P网络由于其不受管制和不受管理的性质，比传统的客户机-服务器网络更容易受到恶意或虚假内容、恶意代码、蠕虫、病毒和特洛伊木马的传播。监管P2P网络是极其困难的，因为这些网络的分散性和即时性。此外，P2P网络和互联网一样，在物理上是跨越地理边界的，因此受到各种法律的约束。用于生成信任和保护客户机-服务器网络的传统机制不能用于pure1点对点网络。这是因为在传统的客户机-服务器网络中使用的可信中心机构在点对点网络中不存在。我们提出了一种自组织信任模型，旨在通过在邻近的对等体之间建立信任关系来减少对等体系统中的恶意活动。对等体不会尝试从所有其他对等体收集信任信息。P2P中的每个对等体对过去相互作用的对等体形成了自己的本地信任观。通过这种方式，良好的对等体在其本地附近形成动态信任组，并可以隔离恶意的对等体。由于对等体通常倾向于与一小部分对等体进行交互，因此在它们邻近的对等体中形成信任关系有助于减轻P2P系统中的攻击。
Peer-to-Peer (P2P) networks are self-configuring networks with minimal or no central control. P2P networks are more vulnerable to dissemination of malicious or spurious content, malicious code, worms, viruses, and Trojans than the traditional client-server networks, due to their unregulated and unmanaged nature. Policing P2P networks is extremely difficult due to the decentralized and ad hoc nature of these networks. Besides, P2P networks, like the Internet, are physically spread across geographic boundaries and hence are subject to variable laws. The conventional mechanisms for generating trust and protecting client-server networks cannot be used for pure1 peer to peer networks. This is because the trusted central authority used in the conventional client-server networks is absent in peer to peer networks. We propose a self organizing Trust model that aims to decrease malicious activity in a peer to peer system by establishing trust relations among peers in their proximity. Peers do not try to collect trust information from all other peers. Each peer in P2P develops its own local view of trust about the peers interacted in the past. In this way, good peers form dynamic trust groups in their local proximity and can isolate malicious peers. Since peers generally tend to interact with a small set of peers, forming trust relations in their proximity of peers helps to mitigate attacks in a P2P system.