RFC 8619 · PROPOSED STANDARD · 2019
SUN · 14 JUN 2026
Algorithm Identifiers for the HMAC-based Extract-and-Expand Key Derivation Function
Overview
RFC 8619, “Algorithm Identifiers for the HMAC-based Extract-and-Expand Key Derivation Function”, is a Proposed Standard document published in June 2019 by R. Housley. The canonical text is published by the RFC Editor.
Abstract
RFC 5869 specifies the HMAC-based Extract-and-Expand Key Derivation Function (HKDF) algorithm. This document assigns algorithm identifiers to the HKDF algorithm when used with three common one-way hash functions.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 8619 is hosted at rfc-editor.org. Available in TXT,HTML.
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