基于平衡理论的P2P信任模型的建构与设计

Construction and Design of P2P Trust Model Based on Equilibrium Theory

当前P2P网络中存在着大量的恶意节点攻击和共谋团体欺骗等问题,已存在的信任模型在一定程度上完善了P2P网络环境;但模型的侧重点不同,无法全面解决大规模的恶意攻击和欺骗。为此,提出了基于平衡理论的P2P信任模型。该模型由信任结构的构建、恶意节点检测和信任推测等三部分完成。模型首先根据平衡理论构建信任网络;针对恶意节点的攻击,利用平衡理论定义节点的平衡因子,通过计算恶意行为对网络平衡性的影响来检测恶意节点;最后利用信任推测算法来推测信任节点,防止网络加入不信任的节点,降低网络的安全性。实验结果表明该模型可靠完善,算法有效和健壮。

There are a large number of malicious attack nodes and collusion groups in P2P network, trust model already exists to some extent improves the P2P network environment, but the emphasis of the model are different, unable to fully solve large-scale malicious attacks and deception. For this, a P2P trust model based on equilibrium theory is presented. The model is completed by constructing the trust structure, the malicious node detection and trust speculated three parts. The model constructs trust network according to the equilibrium theory firstly; For ma- licious nodes attack the equilibrium theory defined nodes balance factor is used, by calculating the impact of mali- cious behavior on the network to detect balance malicious nodes. Finally using trust inference algorithm to estimate trust nodes, prevents network nodes into distrust and reduces network security. Experimental results show that the model is perfect and reliable, the algorithm is efficient and robust.