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counterfeit

Definition(s):

  An unauthorized copy or substitute that has been identified, marked, and/or altered by a source other than the item's legally authorized source and has been misrepresented to be an authorized item of the legally authorized source.
Source(s):
NIST SP 800-161 under Counterfeit (Goods) from 18 U.S.C.
NIST SP 800-53 Rev. 5 from NIST SP 800-161