密文数据库是增强数据库系统安全性的有效技术途径。
Encrypted database is an effective technique to strengthen the security of database Management System.
计算机系统和网络的安全是分布式数据库系统安全的基础。
Computer system and network security are basis of security of distributed database system.
多级安全查询处理器必须保证用户的查询不违反数据库系统安全性的要求。
It supports querying by security level and must ensure that user's querying will not violate the security requirements of database.
大多数主流商用数据库产品安全级别较低，从实际角度考虑提出通过安全增强系统提高数据库系统安全性。
Most of the commercial DBMS products are lower in the security class ratings. Considering facts, a scheme to strengthen the security of database by a security enhanced system is proposed.
系统安全是大型数据库系统设计中的一个重要问题。
System security is one of the chief problems in large-scale database design.
另外，阐述了在任何一个数据库系统中、都不可避免的系统安全性问题的实施策略和解决方案。
This thesis also proposes implement strategy and solution scheme of system security problem which every database system can not avoid.
最后论文结合数据库系统的设计，论述了数据完整性，从信息安全和网络安全两个方面对系统安全性进行了设计与研究。
Finally, Combined with the design of database system, the paper discusses the data integrity, and does some design and research on system security through information security and network security.
最后论文结合数据库系统的设计，论述了数据完整性，从信息安全和网络安全两个方面对系统安全性进行了设计与研究。
Finally, Combined with the design of database system, the paper discusses the data integrity, and does some design and research on system security through information security and network security.
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