With the progresses of research and application of Multilevel Secure database, new requirements of Multilevel Secure Models are presented.
随着多级安全数据库研究和实际应用的深入，对多级安全数据模型提出了新的要求。
Inference control in databases is a key field of multilevel secure database system (MLS-DBS) and is an important means to achieve database security.
数据库推理控制是研究高安全等级的安全数据库系统的关键技术之一，是保障数据库安全的重要手段。
In this paper, The idea of mapping multilevel secure database into several databases, and each subject operates on database trusted by himself is introduced.
本文提出了将多级安全数据库映射成为多个数据库，各个用户在其信赖的数据库上进行操作的思想。
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。
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。
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