Primary definition
The process used to identify: (i) software programs that are not authorized to execute on an information system; or (ii) prohibited universal resource locators (URL)/websites. Source: NIST SP 800-53 Rev 4
Also known asblocklisting · denylist · block list · deny list · URL filtering · website blocking
2 sources cited4 related termsReviewed Aug 9, 2026
— Committee on National Security Systems Glossary CNSSI 4009-2015View source
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CNSSGC
The process used to identify: (i) software programs that are not authorized to execute on an information system; or (ii) prohibited universal resource locators (URL)/websites. Source: NIST SP 800-53 Rev 4
Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Blacklisting. In Election Security Glossary. Retrieved August 22, 2026, from https://electionsecurityglossary.com/glossary/blacklisting
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
Disputed
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