一种新型的网格行为信任模型

One New Behavior Trust Model in Grid Computing System

网格计算系统是一个分布式的高性能计算机环境,由广域分布的异构的计算机和资源组成,旨在使用户可以透明地共享使用这些资源,而且彼此可以进行区域间的紧密合作。为了保证这种共享合作更加安全可靠、更具吸引力,在网格系统中提出了信任的概念,具体又可划分为身份信任与行为信任。其中身份信任主要负责身份验证以及用户权限等问题,而行为信任关注的是更广泛意义上的可信赖性问题,用户可根据过去相互间行为接触经验而及时动态地调整更新彼此间的信任关系。该文着重描述行为信任的含义和计算方法,并在此基础上提出了一种新型网格行为信任体系模型,最后通过举例具体讨论说明了它的应用过程。

A Grid computing system is a high performance distributed environment ,which is composed of heterogeneous geographically-distributed computers and resources,with the intent of providing users transparent access to or sharing these resources and providing domain -to -domain close interactions.To guarantee this sharing and interaction more reliable and attractive,the″trust″notion is introduced in Grid computing system,including identity trust and behavior trust.Identity trust is concerned with verifying the entity authenticity and determining the entity authorizations;while behavior trust deals with a wider notion of trustworthiness,entities can adjust and update mutual trust relationship timely through their past transaction experiences.In this paper,we lay emphasis on the definition and the computation of behavior trust,Furthermore a new behavior trust grid architecture model is provided.At the end,the application of the model is demonstrated in detail through an example.