云计算环境下基于行为的动态信任模型研究

项目名称： 云计算环境下基于行为的动态信任模型研究

项目编号： No.61303117

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 自动化技术、计算机技术

项目作者： 金瑜

作者单位： 武汉科技大学

项目金额： 23万元

中文摘要： 云计算是基于Web Service的新型计算模式，具有自治、开放和动态特性，实体间缺乏信任，服务消费者和服务组合难以选择到高QoS服务。基于行为的动态信任是解决此问题的有效方法。然而，云环境下基于行为的动态信任模型在评价维度和可信度、反映信任动态特性、信任数据存储与访问、域间访问控制等方面存在问题。基于此，本项目拟展开如下研究：1）拟提出一种基于异常检测的动态信任模型，用多维特征向量描述QoS属性，计算测试向量与样本平均向量之间距离，从而预测评价真实性；2）拟提出一个基于行为记录的动态信任模型，根据历史行为统计结果调整目前信任，能更好地反映行为信任动态特性；3）拟提出一种基于QoS属性的信任数据存储与访问机制，既能查找满足QoS需求的服务，又高效和安全；4）拟提出一个基于信任策略的域间授权机制，既简单，也有激励作用。综上所述，本项目实施将对解决云环境下信任缺失、促进云应用具有重要意义。

中文关键词： 云计算；信任；安全；访问控制；审计

英文摘要： The clouding computing is a new model based on Web Service, in which the entities are autonomous, open and dynamic. So there is no trust relationship among them and it is difficult to select the high quality service for the customer and service composition. The behavior-based dynamic trust model is the primary solution. However most of current behavior trust models have many defects such as the dimension and credibility of the ratings, reflecting the dynamic characteristic of the trust, the storing and access of the trust data and the access control on the service requests that are from the different trust domains. Pointing to these problems, we will give the following methods: 1) a dynamic trust model based on the anomaly detection will be proposed, in which multidimensional feature vector will be used to describe the quality of service and the difference between the test vector and the sample average vector will be computed that is used to forecast the reality of the ratings; 2) a record-based dynamic model will be presented that can adjust the current trust according to statistical result of the historical behavior, so the dynamic characteristic of the trust can be reflected better; 3) a QoS-based mechanism of storing and accessing trust data will be given that not only can help the customers to search those

英文关键词： cloud computing；trust；secruity；access control；auditing