采用消息过滤算法可以在支持对象模型的多级安全系统中实现强制访问控制。

Message filter algorithms can implement mandatory access control in the multilevel secure systems with an object oriented model.

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引入了外部角色、内部角色和基本角色，使得该模型可以同时实现自主访问控制和强制访问控制，而且也方便了管理。

Introduced the outer role, inner role and basic role, the model can not only realize Discretionary Access Control but also the Mandatory Access Control. In addition, it can facilitate the management.

youdao

引入了外部角色、内部角色和基本角色，使得该模型可以同时实现自主访问控制和强制访问控制，而且也方便了管理。

Introduced the outer role, inner role and basic role, the model can not only realize Discretionary Access Control but also the Mandatory Access Control. In addition, it can facilitate the management.

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