This paper is the revised and enlarged version of a talk presented to the Information Security Services breakfast meeting held during the annual Computer Security Institute Conference at Anaheim, California, November 11, 1987. It reviews the development of policies regarding the use of computer systems for handling and controlling classified materials; the design and development of secure operating systems; and differences between the security threats to government computer systems on the one hand, and commercial systems on the other. The author discusses whether the objectives of the defense and commercial worlds can be brought together, and concludes that uniformity and standardization of security approaches and safeguards will be essential.
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