基于ORBAC的分布式数据库访问控制机制研究

随着计算机和网络技术的发展,油田数据库系统已向集成应用和分布式处理模式发展,有效地管理企业计算中的大量授权数据已成为首要问题。本文在研究ORBAC模型构架和关键技术的基础上,根据油田数据库应用系统、企业运作机制的特点,将ORBAC的分散管理模型改为层次模型,与企业管理和应用的需求保持一致;探讨了在应用系统和数据库系统的各个层次上可以采取的访问控制策略;并对油田大型分布式数据库系统访问控制机制进行了设计和应用。

RESEARCH OF THE ACCESS CONTROL MECHANISM OF A DISTRIBUTED DATABASE BASED ON ORBAC

With the development of computer and network techniques,oilfield database system has been turned to integration application and distributed processing mode.So effective management of the mass authorization data in calculation effectivlely has become the principle problem.On the basis of research on ORBAC model and key technology,ORBAC decentralized management model is changed into hierarchical model which is in accordance with enterprise management and requirements of application.The adopted access control policy is discussed in the application system and database system.A large distributed database system of access control mechanism is designed and implemented.