基于细粒度的访问控制及性能优化

Access Control and Performance Optimization Based on Fine Granularity

从分析传统的粗粒度对数据库访问机制所存在的安全问题入手,讨论引入细粒度访问控制机制在WEB技术发展进程中的必要性。同时描述了基于谓词方法中Oracle的Virtual Private Database(VPD)访问控制策略,和基于此策略下对数据访问的性能优化方式。

The paper,based on the analysis of the existing security problems of the traditional coarse granularity to database access mechanism,introduced the necessity of fine granularity access control mechanism into the development process of WEB technology.It also described the Oracle Virtual Private Database (VPD) access control policy based on predicate method,and gave the performance optimization methods of data access under this policy.