cryptographic key management activity

This phrase is compositional, not a term of art. Each word carries its ordinary information-security meaning: "cryptographic key" refers to the keying material used in encryption, signing, or authentication operations, and "management activity" refers to any discrete operational step performed against that material across its lifecycle. Key management is the management of cryptographic keys in a cryptosystem, encompassing lifecycle activities such as generation, exchange, storage, use, destruction, and replacement. Authority documents such as the CMS Key Management Handbook use the phrase descriptively — for instance, requiring organizations to document their "key management activities" — rather than defining it as a bounded concept with a fixed meaning. When the phrase appears in a control or checklist, it functions as a catch-all label for any one of those individual lifecycle operations, not as a named category of its own.

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