Primary definition
Prefix appended to the short title of U.S.-produced keying material to indicate its foreign releasability. "A" designates material that is releasable to specific allied nations, and "U.S." designates material intended exclusively for U. S. use. (CNSSI-4009) (NISTIR)
Also known asPrefix Code · Key Prefix · Material Prefix · Releasability Prefix
1 sources cited4 related termsReviewed Aug 10, 2026
— The Cyber GlossaryView source
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TCG
Prefix appended to the short title of U.S.-produced keying material to indicate its foreign releasability. "A" designates material that is releasable to specific allied nations, and "U.S." designates material intended exclusively for U. S. use. (CNSSI-4009) (NISTIR)
The Cyber Glossary · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Prefix. In Election Security Glossary. Retrieved August 20, 2026, from https://electionsecurityglossary.com/glossary/prefix
Sources
1 cited · last checked Aug 10, 2026
01
The Cyber Glossary
The Cyber Glossary
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