The IESG has approved the following document: - 'HMAC-based Extract-and-Expand Key Derivation Function (HKDF) ' <draft-krawczyk-hkdf-01.txt> as an Informational RFC This document has been reviewed in the IETF but is not the product of an IETF Working Group. The IESG contact person is Tim Polk. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-krawczyk-hkdf-01.txt Technical Summary This document specifies a simple HMAC-based key derivation function (HKDF) which can be used as a building block in various protocols and applications. The KDF is intended to support a wide range of applications and requirements, and is conservative in its use of cryptographic hash functions. Working Group Summary This document was not the product of any working group. However, this KDF is already specified in several standards track RFCs produced by IETF wgs, including IKEv2 (RFC 4306), PANA (RFC 5191) and EAP-AKA (RFC 5448). In addition, the cfrg reviewed this document at the request of the sponsoring AD. The discussion was lively, but focused on additional functionality that could be considered. The cfrg did not identify any changes that were required. Document Quality This KDF is widely implemented and used in the context of specific IETF protocols, especially those that rely on IKEv2. Personnel Tim Polk is the Document Shepherd for this document and the Responsible Area Director. RFC Editor Note Please make the following substitutions: Section 1: OLD It is not intended as a call to change existing protocols. NEW: It is not intended as a call to change existing protocols, and does not change or update existing specifications using this KDF. Section 2.2: OLD: PRK = HKDF-Extract(salt, IKM) NEW HKDF-Extract(salt, IKM) -> PRK Section 2.3: OLD OKM = HKDF-Expand(PRK, info, L) NEW: HKDF-Expand(PRK, info, L) -> OKM _______________________________________________ IETF-Announce mailing list IETF-Announce@ietf.org https://www.ietf.org/mailman/listinfo/ietf-announce
