Considers the problem of implementing multilevel security on a compartmented mode workstation using single level relational database management software. A discussion of a large, military information management system is presented in terms of its architecture and security requirements. Trusted managers of the object abstractions used in the solution are explained, as well as the programming concerns surrounding such work. A model for managing data with trusted software is presented, as well as the method by which it is integrated into the COTS platform. Discretionary access and polyinstantiation controls are discussed, and a summary is presented.
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