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The binary data that is used to form secret keys, such as AES encryption or HMAC keys.
NIST SP 800-107 Rev. 1
The binary data that is used to form secret keys, such as AES encryption keys or HMAC keys.
NIST SP 800-135 Rev. 1
As used in this Recommendation, the secret keying material that is either (1) derived by applying the key-derivation method to the shared secret and other shared information during a key-agreement transaction, or (2) is transported during a key-transport transaction.
NIST SP 800-56B Rev. 1 [Superseded] under Secret keying material (that is shared)