网格环境下一种基于分类的行为信任模型

作者:胡剑波;陈良银;徐正坤;殷峰 刊名:四川大学学报(自然科学版) 上传者:雷玉琳

【摘要】在网格环境中,针对不同上下文环境下实体之间的交互行为,提出了一种新的基于分类的行为信任模型.模型根据信任等级对实体进行相应分类,在此基础上与实际社会相结合引入了交互事件重要性因子,惩罚因子,惩罚加速因子等,实现了实体动态的主体特征.分析和仿真表明,模型在性能上得到了一定程度的提高,并对恶意实体的恶意交互行为起到了一定的抑制作用.

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doi: 103969/j. issn. 0490-6756.2010. 02.013 (1. 610064; 2. 610064) TP393 A A behavior trust model based on classification in grid environment HU Jian-B0 1 , CHEN Liang-Yin l , XU Zheng-Kun l , YIN Feng 2 (l. College of Computer Science, Sichuan University ,Chengdu 610064, China; 2. College of Computer Science and Technology, Southwest University for Nationalities, Chengdu 610064, China) Abstract: A new behavior trust model based on classification is proposed to deal with the entity interac-tive behavior of different context in grid environment. The model classifies the entities according to the entity trust rank defined by entity trust value, then paper introduces the interactive event importance factor, the penalty factor, the penalty acceleration factor and so on by associating the model with actual society, that realizes the autonomous characteristic of dynamic entity. The analysis and the simulation indicates that the model has a certain extent enhancement in the performance, and plays a certain inhibi-tory action to the malicious entitys malicious interactive behaviors. Key words: grid, behavior trust, trust model OGSA (Open Grid Serv- ices Architecture) [1] NJ : 863 (2007080504) ; (06SG0937) com 201043 h u B M : 2009-04-30 Journal of Sichuan University (Natural Science Edition) Mar. 2010 vol. 47 No. 2 282 四川大学学报〈自然科学版) 第47卷 和权限的验证问题,主要通过加密、数字签名以及认证协议等手段来实现;而行为信任则是根据实体彼此之间的交互经验动态更新实体间的信任关系,它具有主观性、动态性等,更能满足网格不断变化的动态环境·因此现阶段越来越多的研究者把目光集中到了基于行为的信任模型上· 为了处理网格环境下实体间的信任关系,研究者提

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