[Cfrg] Minimum required work force for additional curve

Kurt Roeckx <kurt@roeckx.be> Thu, 26 February 2015 19:03 UTC

Return-Path: <kurt@roeckx.be>
X-Original-To: cfrg@ietfa.amsl.com
Delivered-To: cfrg@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A15071A1A14 for <cfrg@ietfa.amsl.com>; Thu, 26 Feb 2015 11:03:38 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 0.799
X-Spam-Level:
X-Spam-Status: No, score=0.799 tagged_above=-999 required=5 tests=[BAYES_50=0.8, SPF_HELO_PASS=-0.001] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2C1miTODJz3B for <cfrg@ietfa.amsl.com>; Thu, 26 Feb 2015 11:03:37 -0800 (PST)
Received: from defiant.e-webshops.eu (defiant.e-webshops.eu [82.146.122.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id DD0551A079A for <cfrg@irtf.org>; Thu, 26 Feb 2015 11:03:36 -0800 (PST)
Received: from intrepid.roeckx.be (localhost [127.0.0.1]) by defiant.e-webshops.eu (Postfix) with ESMTP id EE3BB1C20DF for <cfrg@irtf.org>; Thu, 26 Feb 2015 20:03:33 +0100 (CET)
Received: by intrepid.roeckx.be (Postfix, from userid 1000) id C32201FE056F; Thu, 26 Feb 2015 20:03:33 +0100 (CET)
Date: Thu, 26 Feb 2015 20:03:33 +0100
From: Kurt Roeckx <kurt@roeckx.be>
To: cfrg@irtf.org
Message-ID: <20150226190333.GA12230@roeckx.be>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.5.23 (2014-03-12)
Archived-At: <http://mailarchive.ietf.org/arch/msg/cfrg/nlfud9YyzUwdf73X4tEKOBZyUSg>
Subject: [Cfrg] Minimum required work force for additional curve
X-BeenThere: cfrg@irtf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Crypto Forum Research Group <cfrg.irtf.org>
List-Unsubscribe: <http://www.irtf.org/mailman/options/cfrg>, <mailto:cfrg-request@irtf.org?subject=unsubscribe>
List-Archive: <http://www.irtf.org/mail-archive/web/cfrg/>
List-Post: <mailto:cfrg@irtf.org>
List-Help: <mailto:cfrg-request@irtf.org?subject=help>
List-Subscribe: <http://www.irtf.org/mailman/listinfo/cfrg>, <mailto:cfrg-request@irtf.org?subject=subscribe>
X-List-Received-Date: Thu, 26 Feb 2015 19:03:38 -0000

Since I think this hasn't been clearly asked and that it might
explain the answer on the other questions asked, I'm guess I'll
just ask it myself:

Assuming other than the 128 WF curve we only add 1 other curve,
what is the minimum WF it should have?

I'm proposing the following answers, each time 16 bit more:
144
160
176
192
208
224
240
256


Kurt