面向服务移动社交网络中基于信任的分布式服务组合方法  

Trust-Based Decentralized Service Composition Approach in Service-Oriented Mobile Social Networks

作　　者：张涛[1,2] 马建峰[1,2] 习宁[1,2] 刘西蒙[2] 熊金波[3] 

机构地区：[1]西安电子科技大学计算机学院,陕西西安710071 [2]西安电子科技大学陕西省网络与系统安全重点实验室,陕西西安710071 [3]福建师范大学软件学院,福建福州350108

出　　处：《电子学报》2016年第2期258-267,共10页Acta Electronica Sinica

基　　金：国家自然科学基金重点资助项目(No.U1405255;No.U1135002);国家自然科学基金(No.61370078);国家科技部重大专项(No.2011ZX03005-002)

摘　　要：针对服务不透明性、信任需求主观性及移动参与者连接机会性对面向服务移动社交网络中可信服务组合带来的问题,提出基于信任的分布式服务组合方法.该方法基于格模型建立分布式服务信任评估框架,分别在组件和组合级评估服务信任度以避免不可信的数据传输;通过分析服务依赖关系,实现满足全局和局部信任约束可信服务选择;基于蒙特卡洛方法建立可信路径选择、优化和容错算法传输服务评估调用信息.实验结果表明所提方法在服务评估开销低,在路径选择成功率和信任度高,是适应面向服务移动社交网络的服务组合方法.Trustworthy service composition in service-oriented mobile social networks suffers from the opaque characteristics of service components,the subjective interpretation of trust requirements,and the opportunistic connectivity of social participants. To tackle these issues,we propose a trust-based decentralized service-composition approach. The proposed approach decentralizedly evaluates the trustworthiness of target services at both component and composite levels based on a lattice-based trust model to prevent data from being transmitted to untrustworthy counterparts. Moreover,by analyzing the dependency relationships,service are selected satisfied both global and local constraints specified by service consumers and vendors respectively. Finally,based on Monte Carlo method,a trustworthy social path selection,optimization and fault-tolerant approach is developed to deliver service evaluation and invocation information. Experimental results demonstrate its practical suitability of service composition for service-oriented mobile social networks,which leads to lowcost for service evaluation,as well as high success rate and aggregated trust value for path selection.

关 键 词：信任 分布式服务评估 路径选择 服务组合 面向服务的移动社交网络 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]