Primary definition
Prearranged procedure in which a subject requests authentication of another and the latter establishes validity with a correct reply.
Also known aschallenge-response authentication · CRA · challenge-response protocol · CRP · challenge-response system
2 sources cited4 related termsReviewed Aug 9, 2026
— Committee on National Security Systems Glossary CNSSI 4009-2015View source
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CNSSGC
Prearranged procedure in which a subject requests authentication of another and the latter establishes validity with a correct reply.
Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Challenge And Reply Authentication. In Election Security Glossary. Retrieved August 21, 2026, from https://electionsecurityglossary.com/glossary/challenge-and-reply-authentication
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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