Through analysis of the need of grid security, checking grid security by different aspects, the physical and logic views of grid security model were presented.
通过对网格安全需求进行分析，从不同角度观察网格安全，抽象出网格安全模型的物理视图和逻辑视图。
This dissertation studies how to build trust model for grid computing in order to find out malicious users and improve security and reliability of system.
本文研究如何在网格计算中建立信任模型，来排除内部恶意节点，提高系统的安全可靠程度。
Existing Grid security certificate models include: centralized ca (certificate Authority) model, multi-CA model and crossed certificate model.
现有的网格安全认证模型有集中式层次认证模型、多CA结构的模型和混合交叉认证模型。
This security grid model ensures that the legal user can access grid resouces;
此安全模型保证合法的用户可以访问网格资源；
Current grid security infrastructure establishes the security policy space inside a VO mainly on basis of the public key infra-structure and distributed trust model.
现有的网格安全体系GSI主要是通过公钥体系及建立在其上的分布式信任模型来建立与维护虚拟组织内部的安全策略空间。
Traditional model of access control can not satify security requerments of grid either.
为此，提出了一种基于任务的计算网格访问控制模型。
Traditional model of access control can not satify security requerments of grid either.
为此，提出了一种基于任务的计算网格访问控制模型。
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