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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
Keyed-hash Message Authentication Code (as specified in FIPS 198-1).
NIST SP 800-108 under HMAC
NIST SP 800-56C under HMAC
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