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针对现有对等(P2P)网络信任模型大多假设在一种理想的环境中,很少考虑节点内部和外部环境影响的问题,提出一种新的基于偏差因子的信任模型(TMDF).TMDF通过引入内部能力和外部能力的概念,构造多维评价向量,参考了社会网络中信任关系的建立方法,分别从2个方面计算节点的可信度,通过引入偏差因子计算推荐节点的推荐可信度,最终根据直接信任和推荐信任计算综合可信度.分析和仿真结果表明,该模型可提供更为真实的信任服务,并对抵制诋毁、共谋等恶意行为具有良好的抗攻击性能.
Most trust models based on existing P2P networks assume that in an ideal environment, little consideration is given to the influence of internal and external nodes on the node, a new trust factor model (TMDF) based on deviation factor is proposed. By introducing the concept of internal ability and external ability, constructing multidimensional evaluation vectors, referring to the establishment of trust relationship in social network, calculating the trustworthiness of nodes from two aspects respectively, calculating the recommended trustworthiness of recommended nodes by introducing deviation factor, Finally, the comprehensive trustworthiness is calculated based on the direct trust and the recommended trust.The analysis and simulation results show that the model can provide a more realistic trust service and has good anti-attack performance against such malicious acts as resistance to vilification and collusion.