Primary definition
Capability of an information system that is trusted to contain, and maintain separation between, resources (particularly stored data) of different security domains.
Also known asMSL · multi-level security · multilevel security · multiple security levels (MSL) · multi-security levels · multiple-level security
2 sources cited4 related termsReviewed Aug 9, 2026
— Committee on National Security Systems Glossary CNSSI 4009-2015View source
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CNSSGC
Capability of an information system that is trusted to contain, and maintain separation between, resources (particularly stored data) of different security domains.
Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Multiple Security Levels (msl). In Election Security Glossary. Retrieved August 17, 2026, from https://electionsecurityglossary.com/glossary/multiple-security-levels-msl
Sources
2 cited · last checked Aug 9, 2026
01
Committee on National Security Systems Glossary CNSSI 4009-2015
Committee on National Security Systems Glossary CNSSI 4009-2015
High consensus
02
The Cyber Glossary
The Cyber Glossary
Multi-source
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