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Equipment designed to provide security to telecommunications by converting information to a form unintelligible to an unauthorized interceptor and, subsequently, by reconverting such information to its original form for authorized recipients; also, equipment designed specifically to aid in, or as an essential element of, the conversion process. COMSEC equipment includes cryptographic-equipment, crypto-ancillary equipment, cryptographic production equipment, and authentication equipment.
CNSSI 4009-2015 from