N
NAC

See network access control (NAC).

NAT

Network Address Translation. See IP proxy.

National Computing Security Center (NCSC)

The agency that developed the Trusted Computer System Evaluation Criteria (TCSEC) and the Trusted Network Interpretation Environmental Guideline (TNIEG).

National Institute of Standards and Technology (NIST)

An agency (formerly known as the National Bureau of Standards [NBS]) that has been involved in developing and supporting standards for the U.S. government for over 100 years. NIST has become involved in cryptography standards, systems, and technology in a variety of areas. It's primarily concerned with governmental systems, where it exercises a great deal of influence.

National Security Agency (NSA)

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