• 1. RBAC authorization model: RBAC授权模型

• 1.Based on RBAC model, this paper introduces negative authorization into the user assignment and permission assignment, and discusses their realizing approaches and features.
  本文在RBAC模型基础上，分别在用户分配和权限分配中引入了负授权，讨论了负授权的实现方式及其特点。
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• 2.An identity-based authorization model is presented in this paper. It combined the identity authentication technique of PKI and the access control technique of RBAC.
  从身份认证和访问控制入手，结合PKI和RBAC技术，提出了一种针对电子病历的基于身份的授权模型。
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• 3.This paper analyzed the problems existing in administration of authorization in MIS and applied the RBAC in MIS, then presented a logic model of implementation.
  文中分析了目前MIS实施中权限管理存在的问题，并将RBAC应用于管理信息系统中，给出了实现的逻辑模型。
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