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P2P Reputation Management Using Distributed Identities and Decentralized Recommendation Chains

机译:使用分布式身份和分散推荐链的P2P信誉管理

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摘要

Peer-to-peer (P2P) networks are vulnerable to peers who cheat, propagate malicious code, leech on the network, or simply do not cooperate. The traditional security techniques developed for the centralized distributed systems like client-server networks are insufficient for P2P networks by the virtue of their centralized nature. The absence of a central authority in a P2P network poses unique challenges for reputation management in the network. These challenges include identity management of the peers, secure reputation data management, Sybil attacks, and above all, availability of reputation data. In this paper, we present a cryptographic protocol for ensuring secure and timely availability of the reputation data of a peer to other peers at extremely low costs. The past behavior of the peer is encapsulated in its digital reputation, and is subsequently used to predict its future actions. As a result, a peer's reputation motivates it to cooperate and desist from malicious activities. The cryptographic protocol is coupled with self-certification and cryptographic mechanisms for identity management and countering Sybil attack. We illustrate the security and the efficiency of the system analytically and by means of simulations in a completely decentralized Gnutella-like P2P network.
机译:对等(P2P)网络容易受到欺骗,传播恶意代码,在网络上窃取或根本不合作的对等点的攻击。由于其集中性,为诸如客户端-服务器网络之类的集中式分布式系统开发的传统安全技术不足以用于P2P网络。 P2P网络中缺少中央授权机构给网络中的信誉管理提出了独特的挑战。这些挑战包括对等方的身份管理,安全信誉数据管理,Sybil攻击,以及最重要的是信誉数据的可用性。在本文中,我们提出了一种加密协议,用于确保以极低的成本安全,及时地将对等方的信誉数据提供给其他对等方。对等方的过去行为被封装在其数字信誉中,并随后用于预测其将来的行为。结果,同伴的声誉促使其合作并远离恶意活动。加密协议与自我认证和加密机制结合在一起,用于身份管理和应对Sybil攻击。我们通过完全分散的类似于Gnutella的P2P网络中的仿真分析和说明了系统的安全性和效率。

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