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Key derivation

Definitions:

  The process of deriving a key in a non-reversible manner from shared information, some of which is secret.
Sources:
NIST SP 800-152

  As used in this Recommendation, a method of deriving keying material from a pre-shared key and possibly other information. See NIST SP 800-108.
Sources:
NIST SP 800-57 Part 2 Rev.1

  A process by which one or more keys are derived from a shared secret and other information during a key-agreement transaction.
Sources:
NIST SP 800-133 Rev. 2

  A process that derives new keying material from a key (i.e., a key-derivation key) that is currently available.
Sources:
NIST SP 800-133 Rev. 2

  The process by which keying material is derived from either a pre-shared key or a shared secret produced during a key-agreement scheme along with other information.
Sources:
NIST SP 800-175B Rev. 1

  The process by which keying material is derived from either a pre-shared key or a shared secret (from a key-agreement scheme), along with other information.
Sources:
NIST SP 800-57 Part 1 Rev. 5

  The process by which keying material is derived from 1) either a cryptographic key or a shared secret produced during a key-agreement scheme and 2) other data. This Recommendation specifies key derivation from an existing cryptographic key and other data.
Sources:
NIST SP 800-108r1 [August 2022 (Includes updates as of 02-02-2024)] under key derivation