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Security Dictionary
Can't tell 'smtp' from 'snmp'? Find the precise meaning of these and hundreds of other security-related terms in our convenient and up-to-date Security Dictionary.
BLACK
(I) Designation for information system equipment or facilities
that handle (and for data that contains) only ciphertext (or,
depending on the context, only unclassified information), and for
such data itself. This term derives from U.S. Government COMSEC
terminology. (See: RED, RED/BLACK separation.)