update (a key)

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Definitions:

Automatic or manual cryptographic process that irreversibly modifies the state of a COMSEC key, equipment, device, or system.
Sources:
CNSSI 4009-2015 from NSA/CSS Manual Number 3-16 (COMSEC)

Glossary Comments

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See NISTIR 7298 Rev. 3 for additional details.