Keyed-Hash Message Authentication Code.
NIST SP 800-185 under HMAC
Keyed-Hash Message Authentication Code specified in [FIPS198].
NIST SP 800-57 Part 1 Rev. 4 under HMAC
A message authentication code that uses a cryptographic key in conjunction with a hash function.
CNSSI 4009-2015 under keyed hash-based message authentication code (HMAC)
Keyed-hash Message Authentication Code (as specified in FIPS 198-1).
NIST SP 800-108 under HMAC
NIST SP 800-56C under HMAC