【作者】 王维盛；

【导师】 马满福；

【作者基本信息】 西北师范大学 ， 基础数学， 2007， 硕士

【摘要】 网格环境中的信任问题是当前网格研究的一个热点问题,为了解决网格环境的动态性和不确定性带来的可靠性问题,就需要对实体在网格环境下的行为进行评价,反映出该实体网络行为的可信程度。本文探讨了网格环境下的安全需求,提出了网格信任的相关定义,并对现有的网格信任模型进行了归纳、分析和比较,明确了它们各自的优越性、局限性和适用范围,为提出更先进的模型奠定了基础。本文的主要研究成果如下:1)提出了一种域与实体自主性相结合的新型的网格信任模型。该模型充分考虑了信任域的可管理性和网格实体的自主性,并对网格环境中实体的信任度和声誉进行了分析,对域内的信任关系和域间的信任关系分别采用不同的方法来进行处理。2)进一步研究了如何在网格计算中建立信任模型,提出了基于目录服务LDAP的网格信任模型的实现策略,用来处理网格环境中实体之间的信任关系。实验表明,该信任模型能有效地抑制协同作弊的威胁,提高了系统的可靠程度。更多还原

【Abstract】 The trust problem in grid environment is a hot topic in current grid research. It is necessary to evaluate the network behavior of entities in grid computing in order to resolve the dependability problems due to the dynamics and uncertainty of the grid environment. Thus, evaluation of the entity’s network behavior can reflect his reliability. This paper discusses the security requirements in grid environment, offers the correlative definitions of trust, compares and analyzes several existing trust models including their advantages, disadvantages and fit range, which provides the foundation for the further research work.The contributions of this dissertation are as follows.1) A new grid trust model combining the domain and independence of entities has been proposed. The model takes into account both the self-determination of grid entities and administrable of trust domain. It provides a method to analyze the trust degree of entities and the report in the grid environment. The two different trust relationships within and between domain are handled with different approaches.2) This dissertation studies how to build a trust model for grid computing. A new strategy of grid trust model based on Directory Services of LDAP has been proposed. This model is used to dispose of the trust relationships between entities in the grid environment. Experiment testifies that the trust model can restrain the complicity threat and promote reliability of system.更多还原