基于关注点空间的信任模型  

Trust model based on focus point space

作　　者：曹晖[1] 覃征[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《清华大学学报（自然科学版）》2011年第11期1691-1695,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国防"十一五"预研基金项目(402040202)

摘　　要：信任模型是一种重要的可信服务保障机制,被广泛应用于分布式动态环境中。针对节点的多方面属性,引入关注点空间的概念,将节点的可信度按照物理属性和行为属性进行了细粒度划分,充分考虑节点自身属性、行为特征、时间因子以及上下文环境,通过动态调节权值,对节点信任值进行评估,凸显了节点被关注方向上的可信度,提高了信任模型的动态调节能力和多领域普适性。仿真实验表明:该模型和已有的信任模型相比,具有更好的动态适应能力,能够有效处理恶意节点对其他节点的攻击。Trust models are important guarantee mechanisms for trusted security services and are widely applied in distributed dynamic environments. This paper describes a ＂focus point space＂ and a dynamic trust model for the various properties of the peers, with a fine-grained division of property profiles according to the physical and behavior properties. The model considers the peer＇s attributes, behavioral characteristics, time factors, and context. The model evaluates the credibility of peers through dynamic adjustments of weights, highlights peer reliability and improves the dynamic regulation ability for universal application of the trust model in various fields. Simulations show that this model has better dynamic adaptability than the existing models to effectively deal with malicious peers＇ attacks from other partners on peers.

关 键 词：信任模型 关注点空间 行为属性 物理属性 分布式动态环境 

分 类 号：TP311.11[自动化与计算机技术—计算机软件与理论]