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一种面向软件服务的信任评估方法

, PP. 63-67

Keywords: 信任评估,两级过滤,软件服务

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Abstract:

由于分布式系统没有授权的控制中心,对系统中可信的软件服务的请求存在一定的困难,需要用可行的方法对软件服务做出客观准确的信任评估.提出一种符合信任动态性的软件服务的直接信任度评估方法,引入衰减因子,使直接信任度在无论有无新的上下文被检测到的情况下都会随时间动态进化.在对全局信任度更新中同样引入衰减因子,以体现信任的动态性.针对推荐信任度评估,提出一个两级过滤TLF(Two-LevelFiltering)方法,根据深度阈值和信任程度阈值尽可能减少请求的深度并摒弃危险的推荐,一定程度上降低了使用软件服务的潜在风险,同时也节约了信任评估的计算资源.

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