Orange Book N. The U.S. Government's Standards Document "Trusted Computer System Evaluation Criteria, DOD Standard 5200.

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Orange Book n.

The U.S. Government's standards document
"Trusted Computer System Evaluation Criteria, DOD standard
5200.28-STD, December, 1985" which characterize secure computing
architectures and defines levels A1 (most secure) through D
(least). Modern Unixes are roughly C2. See also crayola books,

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