摘要
由于网格的动态性和不确定性所带来的安全问题,网格实体间的信任关系成为研究的热点。本文改进了一种分层自主信任模型,并给出适应该模型信任值的计算公式和更新方法,其中在信任值的计算中考虑到QoS需求,且在综合信任值计算时引入标准正态分布函数,使得推荐信任所占权重不再是常数,故能较好地符合实际的交易活动。分析和仿真表明,本文提出的信任值计算公式提高了网格系统的交易成功率。
The study on trust relationship among grid entities has become one of the hottest researches because of the security problem resulting from the dynamics and the uncertainty of grid transmission.The paper improves one of the Hierarchical model of self-confidence,then proposes the realization of it＇s calculating formula and the update method of the trust value.During the process,we take the requirements of QoS into account and introduce the standard normal distribution function which makes the weight recommended by the trust no longer be a constant,so that it can meet the need of the actual transactions better.Analysis and simulation show the trust value calculating formula improves the success rate of transactions.
出处
《软件》
2011年第4期100-104,共5页
Software
关键词
网格环境
信任模型
信任值
服务质量
信任域
Grid environment
Hierarchical model
Trust value
Quality of Service （QoS）
Domain
