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随着计算机技术的发展,数据库系统作为计算机信息系统的核心部件,其安全性至关重要,如何有效地保证数据库系统的安全,实现数据的有效性、保密性和完整性,已经成为国内外研究的重要课题之一。数据库系统的安全框架可划分为网络系统层次、宿主操作系统层次和数据库管理系统层次。一、网络系统层次安全技术网络系统是数据库应用的外部环境和基础,数据库系统要发挥其强大作用离不开网络系统的支持,数据库系统的用户也要通过网络才能访问数据库的数
With the development of computer technology, as the core component of computer information system, database system is very important. How to effectively ensure the security of database system, and to ensure the validity, confidentiality and integrity of the data has become a hot issue both at home and abroad One of the important topics. Database system security framework can be divided into the network system level, the host operating system level and database management system level. First, the network system-level security technology Network system is the database application of the external environment and the foundation of the database system to play its powerful role can not be separated from the network system support, database system users also have to access the database through the network number