Titlebook: Database Security IX; Status and prospects David L. Spooner,Steven A. Demurjian,John E. Dobso Book 1996 IFIP International Federation for I

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A formal specification of an authorization model for object-oriented databasesway, each new access rule can be tested for compliance with the requirement of maintaining a secure system. The use of implicit access rules (i.e., rules derived from others using data associations) makes this security model unique, and its representation in a formal model is of interest.

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Albumin

Conserving Tropical Leguminous Food Cropstemporal multilevel database to be specified. We also show that this language can be used to specify general and various downgrading rules. We conclude this paper by providing several examples of downgrading rules in the context of the entity-relationship model.

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