[Cfrg] How to (pre-)compute a ladder [revised version]

Francisco Rodriguez- Henriquez <francisco@cs.cinvestav.mx> Fri, 12 May 2017 00:19 UTC

Return-Path: <francisco@cs.cinvestav.mx>
X-Original-To: cfrg@ietfa.amsl.com
Delivered-To: cfrg@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 28729129A90 for <cfrg@ietfa.amsl.com>; Thu, 11 May 2017 17:19:22 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 0.797
X-Spam-Level:
X-Spam-Status: No, score=0.797 tagged_above=-999 required=5 tests=[BAYES_50=0.8, RCVD_IN_DNSWL_NONE=-0.0001, RP_MATCHES_RCVD=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
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 xkzE1rok1a8h for <cfrg@ietfa.amsl.com>; Thu, 11 May 2017 17:19:20 -0700 (PDT)
Received: from delta.cs.cinvestav.mx (delta.cs.cinvestav.mx [148.247.102.21]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7D93912EB78 for <cfrg@irtf.org>; Thu, 11 May 2017 17:14:26 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1]) by delta.cs.cinvestav.mx (Postfix) with ESMTP id 6ADC45C1400; Thu, 11 May 2017 19:14:10 -0500 (CDT)
X-Virus-Scanned: amavisd-new at cs.cinvestav.mx
Received: from delta.cs.cinvestav.mx ([127.0.0.1]) by localhost (delta.cs.cinvestav.mx [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hkf2764FV+60; Thu, 11 May 2017 19:14:09 -0500 (CDT)
Received: by delta.cs.cinvestav.mx (Postfix, from userid 1507) id 955635C1412; Thu, 11 May 2017 19:14:09 -0500 (CDT)
Received: from localhost (localhost [127.0.0.1]) by delta.cs.cinvestav.mx (Postfix) with ESMTP id 2DB895C1400; Thu, 11 May 2017 19:14:09 -0500 (CDT)
Date: Thu, 11 May 2017 19:14:09 -0500 (CDT)
From: Francisco Rodriguez- Henriquez <francisco@cs.cinvestav.mx>
To: "cfrg@irtf.org" <cfrg@irtf.org>
cc: =?ISO-8859-15?Q?Julio_C=E9sar_Lopez?= <jlopez@ic.unicamp.br>, Thomaz Oliveira <thomaz.figueiredo@gmail.com>, huseyin.hisil@yasar.edu.tr
In-Reply-To: <alpine.LFD.2.02.1703291804030.8996@delta.cs.cinvestav.mx>
Message-ID: <alpine.LFD.2.02.1705111858040.25089@delta.cs.cinvestav.mx>
References: <CAHOTMVKHA-yJR1oCyPtUp4-aJVc3dTdyxQHNo4xqnJt0hU6jVQ@mail.gmail.com> <CAMm+Lwgm8XzTBarZ1eFePTZGORorBJAeF7brDkhWGQKQVT0LPQ@mail.gmail.com> <CAMm+LwggT_AVv=KjzM1r=6UnkeK+g8zkticXFBDQ0cUXs_PP0A@mail.gmail.com> <CAHOTMVLHPFyi2VWpv85hrZ1MoXqeHYUv52wkMxjj3xp5B4V1cw@mail.gmail.com> <CAMm+Lwgfk1=yEJSbZbaZLvF5k5k66VVSx6MzKLM+DbUV7Ls6Xw@mail.gmail.com> <CAHOTMVK1gYrFiwd8f8zf2zPXYyCorp+jixkcY5FLhfHfv0NkWw@mail.gmail.com> <CAMm+LwjeZdR=ZGX0topN2w6P12jEmR-TQ8M9+anyETj43nbiqg@mail.gmail.com> <CAHOTMVL2e2UjVX6VKgHUbOHrb-gsU8kn_cxY1FdNrnj29cki9g@mail.gmail.com> <alpine.LFD.2.02.1703291804030.8996@delta.cs.cinvestav.mx>
User-Agent: Alpine 2.02 (LFD 1266 2009-07-14)
MIME-Version: 1.0
Content-Type: MULTIPART/MIXED; BOUNDARY="-141290138-861638051-1494547473=:25089"
Content-ID: <alpine.LFD.2.02.1705111905180.25089@delta.cs.cinvestav.mx>
Archived-At: <https://mailarchive.ietf.org/arch/msg/cfrg/o29oAzbe8s6VQTw0H3jqDaiunZU>
Subject: [Cfrg] How to (pre-)compute a ladder [revised version]
X-BeenThere: cfrg@irtf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Crypto Forum Research Group <cfrg.irtf.org>
List-Unsubscribe: <https://www.irtf.org/mailman/options/cfrg>, <mailto:cfrg-request@irtf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/cfrg/>
List-Post: <mailto:cfrg@irtf.org>
List-Help: <mailto:cfrg-request@irtf.org?subject=help>
List-Subscribe: <https://www.irtf.org/mailman/listinfo/cfrg>, <mailto:cfrg-request@irtf.org?subject=subscribe>
X-List-Received-Date: Fri, 12 May 2017 00:19:22 -0000

Dear CFRG community,

We would like to draw your attention to an improved version of our IACR 
pre-print 2017/264 now entitled:

 	"How to (pre-)compute a ladder"

In this revised version, we present an improved differential addition 
formula that uses pre-computation to match the computational cost of the 
classical Montgomery differential addition.

Accordingly, our estimates suggest that a full implementation of our 
pre-computable ladder proposal should outperform state-of-the-art software 
implementations of the X25519 and X448 functions by a 40% speedup when 
working in the fixed-point scenario.

We would be delighted to receive feedback (including sightings of typos) 
from the CFRG community.

With best regards,

Thomaz Oliveira, Julio López, Hüseyin Hisil and Francisco 
Rodríguez-Henríquez