The Department of Defense (DoD) has begun to plan for the implementation of a DoD Directory capability based on the C C I T T X.500 series Recommendations, which define the Data Communacation Networks Directory. The DoD Directory Statement of Requirements has established the need to hold data of different classifications (UNCLASSIFIED to SECRET) and to serve users with daflerent clearances. We describe a prototype Secure Read-only Directory-systemagent Emulator (SRODE) for the DoD Directory. The demonstration of a multilevel SRODE, which is implemented as an application on SeaView, has shown the feasibility of building an MLS DoD Directory with exasting technology.

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