备份与恢复是数据库管理员维护数据库安全性和完整性的重要操作。
The database manager defends the database security and the complete important operation is the backup with restores.
在设计过程中，通过对用户的认证与数据加密机制来确保系统的安全性与数据的完整性。
In the design process, system security and data integrity are ensured by user authentication and encryption respectively.
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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