Overview#

HMAC-based Extract-and-Expand Key Derivation Function is defined in RFC 5869 which specifies a simple HMAC-based HMAC KDF, named HKDF, which can be used as a building block in various protocols and applications, and is already used in several IETF protocols, including IKEv2, PANA, and EAP-AKA

More Information#

There might be more information for this subject on one of the following:

• HKDF
• RFC 5869