Primary definition
Three-dimensional space surrounding information system equipment, within which unauthorized individuals are denied unrestricted access and are either escorted by authorized individuals or are under continuous physical or electronic surveillance.
Also known assecure area · restricted area · protected space · secure zone · restricted zone
2 sources cited3 related termsReviewed Aug 9, 2026
— Committee on National Security Systems Glossary CNSSI 4009-2015View source
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CNSSGC
High consensus
Three-dimensional space surrounding information system equipment, within which unauthorized individuals are denied unrestricted access and are either escorted by authorized individuals or are under continuous physical or electronic surveillance.
Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Controlled Space. In Election Security Glossary. Retrieved August 22, 2026, from https://electionsecurityglossary.com/glossary/controlled-space
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
High consensus
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