Security Marking

nouncandidate·updated May 9, 2026

GlossaryL1 — what DictionaryL2 — how used ThesaurusL3 — relations Universaleverything

Human-readable information affixed to information system components, removable media, or output indicating the distribution limitations, handling caveats, and applicable security markings.

Framework senses

3 senses across 3 frameworks

NISTIR 7298: Glossary of Key Information Security Terms, Revision 21 senseview framework →

§1: Human-readable information affixed to information system components, removable media, or output indicating the distribution limitations, handling caveats, and applicable security markings.

CNSSI-4009 (Glossary of Information Assurance Terms)1 senseview framework →

§1: Human-readable indicators applied to a document, storage media, or hardware component to designate security classification, categorization, and/or handling restrictions applicable to the information contained therein. For intelligence information, these could include compartment and sub-compartment indicators and handling restrictions.

NIST SP 800-531 senseview framework →

§1: Human-readable information affixed to information system components, removable media, or output indicating the distribution limitations, handling caveats, and applicable security markings.