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RFC 5869 - HMAC-based Extract-and-Expand Key Derivation Function (HKDF)

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HMAC-based Extract-and-Expand Key Derivation Function (HKDF) (RFC 5869, )

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RFC 5869: HMAC-based Extract-and-Expand Key Derivation Function (HKDF)

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IETF Datatracker

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This document specifies a simple Hashed Message Authentication Code (HMAC)-based key derivation function (HKDF), which can be used as a building block in various protocols and applications. The key derivation function (KDF) is intended to support a wide range of applications and requirements, and is conservative in its use of cryptographic hash functions. This document is not an Internet Standards Track specification; it is published for informational purposes.

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