Abstract: The study on trust relationship among grid entities has become the hot point because of the security problem resulting from the dynamics and the uncertainty of grid transforming.In this paper，a new layered autonomous trust model based on multi-domains is presented.This model is used to deal with trust relations among entities in the grid environment.And it takes different ways to deal with trust relations in and between domains.The model adopts ideas of hierarchical and entity self-determined trust.Different hierarchies maintain their own trust table respectively，moreover，the dynamic and subjective characteristics of entities are exhibited.A preferable performance in availability and algorithm complexity of the model is indicated through analysis and simulation；and it is the efficient supplement to trust models in grid.

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。提出一种新型的基于信任域的分层自主信任模型来处理网格环境中实体之间的信任关系，并对域内与域间信任关系分别采取不同的计算策略进行处理。模型采用分层和实体自主信任的思想，不同层次维护相应的信任表格，并体现实体动态的主体特性。分析和仿真表明，该模型在有效性和算法复杂度方面显示出较好的性能，是对网格信任模型的有效补充。