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8.2.3 Key Change Function

NIST platform security: roots of trust, firmware and secure enclaves SP 800-57 Part 1 Rev. 4
All changes in this version
first version loaded 8 Key-Management Phases and Functions part of 8.2

Title

Key Change Function

Control

Key change is the replacement of a key with another key that performs the same function as the original key. There are several reasons for changing a key. 1. The key may have been compromised, 2. The key’s cryptoperiod may be nearing expiration, or 3. It may be desirable to limit the amount of data protected with any given key.