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针对开放式网络环境中的实体缺乏足够全局信息,导致实体的信任度较难正确评估的问题.根据开放式网络环境中资源共享具有动态和不确定性等特点,提出了一种新的动态信任评估模型,它包括实体静态属性评估、基于时间的行为推测、基于上下文相关的环境感知和通信条件测评等.与传统信任计算模型相比较,从多维角度详细描述了开放式环境下影响实体信任度计算的各因素,并且引入智能搜索算法,对模型的各因素权重进行求解,避免了经典数学工具难以处理多维评估指标的局限性.实验结果表明,该模型对开放式网络环境下的实体可信性有更好的判别效果,并有较好的实用价值.
In view of the lack of sufficient global information in the open network environment, the trust of the entity is more difficult to correctly assess.According to the characteristics of dynamic and uncertainty of resource sharing in open network environment, a new dynamic trust Assessment model, which includes the assessment of the static attributes of the entity, the time-based behavior estimation, the context-based context awareness and communication condition evaluation, etc. Comparing with the traditional trust computing model, it describes in detail the trust degree And introduces the intelligent search algorithm to solve the weight of each factor of the model and avoids the limitation that the classical mathematical tools can not handle the multi-dimensional evaluation index.The experimental results show that the model is reliable to the entities in open network environment Sex has a better discriminant effect, and has good practical value.