【摘要】 异构数据库系统面临着复杂的数据资源安全管理的难题，基于角色访问控制（简称RBAC）方法方便了数据的安全管理，文章在对访问控制和数据库联合使用综合分析的基础上提出了一个基于角色访问控制和M-W(中间层－包装器)体系结构的异构数据库联合使用模型，对RBAC包装器进行了深入的研究并设计了R-D和R-M两类RBAC包装器，该模型在某企业的信息化集成中进行了实际应用。实践证明该模型非常适用于异构数据库系统环境，同时该模型还在理论上弥补了当前异构数据库领域数据访问控制方面研究的不足。更多还原

【Abstract】 One of the most challenging problems in heterogeneous database system is the complexity of security administration. The RBAC(role-based access control) method shows powerful capability on access control. This paper presents a Role-based access control model for united use of heterogeneous database system based on M-W (mediator -wrapper) construction. The RBAC wrapper is researched deeply and R-D wrapper and R-M wrapper is designed. The model is applied to information integration for some enterprise. It is proved by practice that the model fit heterogeneous database well and it fetch up the deficiency of research on heterogeneous database access control..更多还原