Last Call Review of draft-krawczyk-hkdf-
review-krawczyk-hkdf-secdir-lc-eastlake-2010-02-02-00

Request Review of draft-krawczyk-hkdf
Requested rev. no specific revision (document currently at 01)
Type Last Call Review
Team Security Area Directorate (secdir)
Deadline 2010-02-23
Requested 2010-01-29
Authors Hugo Krawczyk, Pasi Eronen
Draft last updated 2010-02-02
Completed reviews Secdir Last Call review of -?? by Donald Eastlake
Assignment Reviewer Donald Eastlake
State Completed
Review review-krawczyk-hkdf-secdir-lc-eastlake-2010-02-02
Review completed: 2010-02-02

Review
review-krawczyk-hkdf-secdir-lc-eastlake-2010-02-02

I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG. Document editors and WG chairs should treat these comments just like any other last call comments.




This draft specifies an HMAC key derivation function that is divided into two steps: an extract step to get a fixed length pseudo-random key from some inputs and an expand step which expands this pseudo-random key into the desired output keying material.




It appears to be simple, useful, and, to my very limited cryptographic judgement, secure.

Editorial:

Section 2.1, page 3, "has always" -> "always has"




Thanks,

Donald

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 Donald E. Eastlake 3rd   +1-508-634-2066 (home)

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