介绍了基于角色的访问控制模型和基于任务的访问控制模型的原理。
This paper introduces the theory of access control model based on role and task, and analyzes task and the shortage of above models.
基于任务的访问控制模型是一种以任务为中心，并采用动态授权的主动安全模型。
Task based Access Control Model is task centered and offers dynamic authorization , so it belongs to the active security model.
提出了一个数字证书营运中的基于任务的访问控制模型，解决了数字证书营运中的安全问题。
In this paper, we develop a task-based access control model for the service of certificate to solve those secure-problems.
分析了以上两种模型存在的问题，为了使访问控制更灵活，提出了一种基于角色和任务的访问控制模型，并给出了模型的形式化定义、授权约束和在校园网格中的应用。
It puts forwards a new access control mode based on role and task to make access control more flexible. The formalized meaning, restriction and application in school grid are also presented.
在组织机构模型设计中，采用角色和任务的访问控制，达到了对表单中数据的访问控制粒度，满足了工作流管理系统中的访问控制目标。
In the design of organization, the paper gives the access control based on roles and tasks to meet the objective of the workflow management, implementing the access control to the data in the form.
而基于角色的访问控制模型以角色为中介，将用户与权限逻辑隔离，但该模型不能处理有执行顺序的任务；
Role is introduced to separate user and privilege in role-based access control model, but RBAC can't directly control the permission for a sequence of events.
针对网络化制造中协同环境的安全问题，分析了现有访问控制模型以及网络化制造协同任务的应用特点。
Current access control models applied in the network-based manufacturing system and application characteristics of collaborative project were analyzed.
针对网络化制造中协同环境的安全问题，分析了现有访问控制模型以及网络化制造协同任务的应用特点。
Current access control models applied in the network-based manufacturing system and application characteristics of collaborative project were analyzed.
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