【摘要】 提出一个新的安全数据库关系模型,包括一个多级安全模型和增强的外键引用功能。在多级安全模型中,通过扩展了Sandhu的MLR模型给出新的语义,使之描述现实世界更加合理和实用。另外,增强的外键引用功能提高了系统建模的能力。更多还原

【Abstract】 In this paper,we propose a new security database relational model,including a multilevel security model and enhanced foreign key referential function.We extend the Sandhu’s MLR model with new semantics which represents the real world more rationally and practically.And the enhanced foreign key referential function increases the ability of modelling.更多还原