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Orange Book


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).  Stock UNIXes are roughly C1, and can be upgraded to
   about C2 without excessive pain.  See also crayola books,
   book titles.