Implementing Message Systems in Multilevel Secure Environments

Problems and Approaches

by Gary R. Martins, R. Stockton Gaines

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A study of the problems of building multilevel secure message systems. The need for such systems in the government and commercial sectors is growing. Designs are strongly affected by (1) the granularity of security protection (at the level of folders, messages, paragraphs, or words) and (2) planned departures from the Bell-LaPadula security models, for user convenience. A taxonomy of design alternatives is defined, and 16 specific approaches are described and compared.

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