XACML是一个灵活的标准，并且允许策略创建者构建复杂的访问控制策略。
XACML is a flexible standard and allows policy authors to build complex access control policies.
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.
RBAC模型具有灵活性、方便性和安全性的特点，因此成为访问控制策略的首选。
RBAC model is the most popular access control strategy because of its flexibleness, convenience and security.
RBAC模型具有灵活性、方便性和安全性的特点，因此成为访问控制策略的首选。
RBAC model is the most popular access control strategy because of its flexibleness, convenience and security.
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