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[Cfrg] SPAKE2+mbDH a PAKE+PKA

Paul Lambert <paul@marvell.com> Thu, 29 September 2016 01:25 UTC

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From: Paul Lambert <paul@marvell.com>
To: "cfrg@irtf.org" <cfrg@irtf.org>
Thread-Topic: SPAKE2+mbDH a PAKE+PKA
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Date: Thu, 29 Sep 2016 01:25:26 +0000
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Subject: [Cfrg] SPAKE2+mbDH a PAKE+PKA
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The PKEX protocol ( https://tools.ietf.org/html/draft-harkins-pkex-00 )
provides PAKE functionality (with SPAKE2) and adds public key
authentication (PAKE+PKA).

In looking at alternatives to PKEX, combining an existing and evaluated
authenticated public key exchange with a PAKE seems like an interesting
design path. To this end, the SPAKE2 protocol (
https://tools.ietf.org/html/draft-irtf-cfrg-spake2-03 ) combines nicely
with mutually blinded Diffie-Hellman (mbDH). Blinded DH (bDH) is described
in https://www.emvco.com/specifications.aspx?id=285

A brief description of the resulting SPAKE2+mbDH protocol is contained in
slides 13 to 18 of:

	https://mentor.ieee.org/802.11/dcn/16/11-16-1142-04-00ai-cryptographic-rev
iew-and-pkex.ppt

Comments would be appreciated.

If this protocol seems useful an RFC could be developed.

Paul

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