摘要
分析了多级安全关系数据库系统中客体安全级的不同定义方法；描述了基于数据项级的多级关系模式；对利用多示例和分级存储的方法防止高安全级数据的泄漏，多级关系的分解和恢复进行了详细的讨论．
Different methods for defining the object security class in a multilevel security relationaldatabase system are discussed. The multilevel relational schema based on the data item level is described. It is shown that the method with polyinstantiation can be used to prevent the leakage of higher security class data. Hierarchical storage can not only improve the security of data, but also reducethe redundancy in data induced by polyinstantiation. The method of the decomposition and recovery ofthe multilevel relation are discussed at length.
出处
《华中理工大学学报》
CSCD
北大核心
1996年第2期98-101,共4页
Journal of Huazhong University of Science and Technology
关键词
多级安全
关系数据库
多级关系
数据项
multilevel security
relational database
multilevel relation
polyinstantiation
multilevel entity integrity
