In July 1995, Windows NT 3.5 with Service Pack 3 was rated by the National Security Agency as complying with Trusted Computer System Evaluation Criteria (TCSEC) C2 criteria.
Τον Ιούλιο του 1995, τα Windows NT 3.5 με Service Pack 3 αξιολογήθηκαν από την Υπηρεσία Εθνικής Ασφάλειας με το κριτήριο C2 Trusted Computer System Evaluation Criteria.