为了保护患者隐私，PODS的设计采用一个多级安全模型。
To safeguard patient privacy, the PODS design USES a multilevel security model.
把信任机制与多级安全模型相结合，提出了一种信任动态多级安全模型。
The paper proposes a dynamic multilevel security model based on belief, which integrates the belief mechanism and multilevel security model.
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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