... 安全事务模型：secure transaction model 安全并发控制：secure concurrency control 安全策略语言：Security-policy language ...
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On the other hand, multilevel secure database system can not meet timing requirements, so the study of concurrency control protocol in SRTDBS is extremely important significance.
另一方面，安全数据库又不能满足实时性要求，所以对SRTDBS中并发控制协议的研究具有极其重要的意义。
This passage bulids a secure control model with three layers on the ERTDB security requirements firstly, and then proposes a secure optimistic concurrency control strategy.
首先在分析嵌入式实时数据库安全要求的基础上，给出了一个三层安全控制模型。
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