Currently in our country information - based construction , a great deal of foundation equipments ( include the database product ) depend on abroad to usher in , the core technique controlled by the hand of the others , which ca n ' t insure to carry on a secure use and valid supervision . therefore , the exaltation of data secure guarantee ability becomes the bottleneck problem for urgently needing resolving in 21 centuries to our country in the information technique realm 目前我国信息化建设中的大量基础设备(包括数据库产品)依靠国外引进,核心技术掌握在他人之手,无法确保对其进行安全利用和有效监控。因此,提高数据安全保障能力成为21世纪我国在信息技术领域中急需解决的瓶颈问题。当前,分布式数据库安全模型的应用还存在大量问题。
