national security information (NSI)

{
  "id": "MLC-T-CYB-002786",
  "term": "national security information (NSI)",
  "field": "Cybersecurity",
  "definition": "1. Information that has been determined pursuant to Executive Order 12958 as amended by Executive Order 13292, or any predecessor order, or by the Atomic Energy Act of 1954, as amended, to require protection against unauthorized disclosure and is marked to indicate its classified status.\n\n2. Information that Executive Order 13526, \"Classified National Security Information,\" December 29, 2009 (3 CFR, 2010 Comp., p. 298), or any predecessor or successor order, or the Atomic Energy Act of 1954, as amended, requires agencies to mark with classified markings and protect against unauthorized disclosure. Note: Synonymous with classified national security information (CNSI) (see E.O. 13526). Often used interchangeably with national security information (NSI) (see E.O. 13526).\n\n3. Information that has been determined pursuant to Executive Order (E.O.) 13526 or any predecessor order to require protection against unauthorized disclosure and is marked to indicate its classified status when in documentary form.",
  "abbreviation": "NSI",
  "synonyms": [
    "classified national security information"
  ],
  "references": [
    "FIPS 200; NIST SP 800-60 Vol. 1 Rev. 1; NIST SP 800-60 Vol. 2 Rev. 1",
    "CNSSI 4009-2022 from E.O. 13526 (adapted)",
    "NIST SP 800-37 Rev. 2; NIST SP 800-53 Rev. 5 from E.O. 13526",
    "NIST CSRC Glossary"
  ],
  "url": "https://mlchart.com/terminology/cybersecurity/national-security-information-nsi/"
}