最后使用此策略构造了一个基于属性证书的授权和访问控制模型，能够灵活方便地实现电子政务中的安全访问控制。

At last, based on attribute certificate, a model is constructed to solve the authorization and access-control problem, to realize secure access-control in the electronic government.

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采用基于属性证书的RBAC访问控制技术，可以实施更细粒度的访问控制技术。支持DER和PEM格式的数字证书。

Apply RBAC access control technique based on the attribute certificate to gain finer granularity, all with support to DER and PEM format of digital certificate.

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基于规则和角色的访问控制模型RB-RBAC在RBAC模型的基础上引入了用户属性和授权规则，使得用户-角色分配能够自动完成。

Rule-based RBAC (RB-RBAC) modifies RBAC and introduces user attributes and rules to automatically assign users to roles. But there are still shortcomings in RB-RBAC.

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基于规则和角色的访问控制模型RB-RBAC在RBAC模型的基础上引入了用户属性和授权规则，使得用户-角色分配能够自动完成。

Rule-based RBAC (RB-RBAC) modifies RBAC and introduces user attributes and rules to automatically assign users to roles. But there are still shortcomings in RB-RBAC.

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