Hartson, H. Rex2013-06-192013-06-191980http://hdl.handle.net/10919/20307This paper reports some implementation work done within the MULTI SAFE database protection research project group at Virginia Tech. It describes the evolution of an approach to database security from a formal model of predicate-based protection, through an implementation model, to an on-going implementation. The implementation model is based on a relational database approach to the management of protection information (stored representations of authorizations). Classes of access decision dependency are reviewed. Protection policies, design deci¬sions, and special implementation problems are discussed. Detailed examples are used to illustrate the use of this flexible and generalized approach to database security within the MULTI SAFE system architecture.application/pdfenIn CopyrightTechnical reportCS80010-Rhttp://eprints.cs.vt.edu/archive/00000852/01/CS80010-R.pdf