一种开放网络环境中的不确定信任模型

开放网络环境中的信任关系是一种不确定关系,所以在建立信任模型时,需要对信任的不确定性进行建模.为此,提出了一种新的基于云模型的信任模型.通过用一维正态云来对实体之间的信任关系进行描述,本模型将实体之间的信任程度和信任的不确定性统一起来.在此基础上,还提出了基于云的信任关系的传播和合并算法;并通过仿真实验说明,该模型在开放网络环境中具有良好的效果.

Modeling trust with uncertainty for open networks

Since trust relationships are uncertain in open networks, it is necessary to consider uncertainty when modeling trust.A novel trust model was proposed based on the cloud model, which was a useful tool to describe uncertain concept. Modeling trust with cloud, the proposed model could present trust degree and uncertainty degree in a uniform form. Based on such a definition of trust, algorithms to compute propagated trust clouds and aggregated trust clouds were proposed, which were needed in the case of trust reasoning. With simulation experiments, the proposed model were compared with the other two trust models. The results show the cloud-based trust model performs much better in open networks, especially in helping entities to cooperate with each other.