计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (22): 76-79.

• 网络、通信、安全 • 上一篇    下一篇

上下文感知在Web服务动态信任计算中的应用

李 季,刘春梅   

  1. 重庆大学 计算机学院,重庆 400044
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-08-01 发布日期:2011-08-01

Context_aware in Web service dynamic trusted model

LI Ji,LIU Chunmei   

  1. College of Computer Science,Chongqing University,Chongqing 400044,China

  • Received:1900-01-01 Revised:1900-01-01 Online:2011-08-01 Published:2011-08-01

摘要: 针对当前信任模型未能充分考虑环境因素在信任评估中的影响问题,提出了一种基于上下文本体的Web服务动态信任计算模型(CO-WTCM)。该模型通过感知服务实体所处上下文信息,对这些动态、分布、异构的信息进行本体建模,在此基础上采用主客观组合赋权法和模糊综合评估算法对服务实体间的信任关系进行综合评估并通过信任度的综合计算实时更新实体间的信任关系,从而最大程度地保证实体行为的安全和可信。通过与EigenTrust模型相对比,仿真实验验证了该模型的可靠性和有效性。

关键词: Web服务, 上下文本体, 信任计算, 模糊综合评估

Abstract: Existing approaches for trust model often have inadequate support for the change of environment.In order to bridge this gap,a context ontology-based Web service dynamic trust computing model is proposed.This model awares the context of entities which affects the trust relationship,and transform them into different input values.In this model,the method of objective and subjective combination weighting and fuzzy comprehensive evaluation are adopted to evaluate the relationship of trust between the entities.The simulation compared with EigenTrust model,by changing time and the context of entities,result indicates the model is effective and feasible.

Key words: Web service, context ontology, trust computing, fuzzy comprehensive evaluation