云环境多用户的情景化动态信任决策模型及算法的研究

项目名称： 云环境多用户的情景化动态信任决策模型及算法的研究

项目编号： No.71501156

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 管理科学

项目作者： 吴旭

作者单位： 西安邮电大学

项目金额： 17.4万元

中文摘要： 传统的信任管理方法在对云环境中多个用户的信任关系进行处理时，存在不支持多用户信任关系建模、信任动态性认知不够、无法有效解决信任多属性间关联的模糊性和不确定性以及在信任决策时不能对多个并行交易机会进行优先排序等问题。针对以上问题，我们提出了建立多用户的情景化动态信任决策模型的解决思路。该方案包括两个阶段：信任管理和信任决策。在信任管理阶段将通过一个层次化的信任管理体系处理云中多个实体之间的信任关系，并结合动态网络理论和云模型解决动态信任认知和情景化多维信任计算问题,最后基于机器学习的方法实现信任关系的动态度量。在信任决策阶段，将基于效益理论研究风险和信任之间的博弈关系，在此基础上根据决策者不同的风险倾向，对多个并行交易进行信任决策。本项目将通过理论分析、模拟实验和原型系统等多种方式来进行研究。其研究工作将在动态、变化中实现多用户信任关系的管理与可信决策，满足云计算信任问题的迫切需求。

中文关键词： 云计算；信任管理；可信决策

英文摘要： Trust is the most important issue in cloud computing. The trust research is faced with great challenge due to the dynamic complexity and openness of cloud computing. Traditional trust management methods are not well suited for cloud computing due to the weakness and limitation of the models used in practical applications. Many problems aren’t solved in the former trust models such as multi-trust relationship trustworthiness measurement and modeling, dynamic trust describing, multi-dimensional trust computing, trust decision, etc. In order to solve these problems, a contextual and dynamic trust-decision model solution is proposed in the project. The proposed solution includes trust management and trust decision. In trust management step, a hierarchical trust framework is used to deal with the multi-trust relationship trustworthiness measurement and modeling. Dynamic trust describing and multi-dimensional trust computing are solved based on dynamic network theory and cloud model theory. In trust decision step, tradeoff among risk and trust is analyzed base on game theory. The research work is done based on theoretical analysis, simulation experiment and prototype system. The research work changes the limitation of specificity of former trust modeling methods in cloud computing, and realizes multi-trust relationship trustworthiness measurement and modeling in dynamic and varied environment. The aim of our work not only supplies the theoretical model and basis for the widespread use and large-scale applications of cloud computing, but also solves the trust issue in cloud computing. The topic is significant to the theoretical research and practical applications.

英文关键词： cloud computing;trust management;trust decision