基于可拓云的网络信任评估

Network trust evaluation based on extension cloud

针对网络信任评估中存在不确定因素的问题,以复杂开放网络中的安全交易为研究背景,引入可拓云理论,利用可拓学中的物元理论和云模型的不确定性兼二者定性与定量相结合的优点,提出了基于可拓云的网络信任评估模型,实现了信任值定性与定量之间的转换。在此模型基础上提出基于可拓云的网络信任评估方法,对网络安全交易能够有效地进行信任评估,为最终信任决策提供有利依据。仿真实验结果表明:信任决策调度算法提高了信任评估的准确性和交易的成功率,有效缓解了网络交易实体的欺骗行为,评估方法具有可行性和有效性。

Aiming at the problem of uncertain factors in network trust evaluation,under the research background of security trading in complex open network,the extension cloud theory was introduced. Using the matter-element theory of extenics and the uncertainty of cloud model and the advantage of both the quantitative and qualitative analysis,an extension cloud-based network trust evaluation model was proposed. In the proposed model,the transformation between qualitative trust value and quantitative trust value was realized. And then,an evaluation method based on the extension cloud was put forward on the basis of the proposed model. The trust assessment of network security trading can be achieved effectively for providing good basis for final trust decision. The simulation experimental results show that,the trust evaluating and scheduling algorithm has improved the accuracy of trust evaluation and the successful rate of transaction in complex network environment and alleviated the network transaction entity fraud effectively. The proposed network trust extension method is effective and feasible.