Return-Path: <gavinandresen@gmail.com>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
	[172.17.192.35])
	by mail.linuxfoundation.org (Postfix) with ESMTPS id DF338E5D
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Fri,  8 Jan 2016 16:06:36 +0000 (UTC)
X-Greylist: whitelisted by SQLgrey-1.7.6
Received: from mail-lf0-f42.google.com (mail-lf0-f42.google.com
	[209.85.215.42])
	by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 08653178
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Fri,  8 Jan 2016 16:06:36 +0000 (UTC)
Received: by mail-lf0-f42.google.com with SMTP id i124so10150012lfe.3
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Fri, 08 Jan 2016 08:06:35 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
	h=mime-version:in-reply-to:references:date:message-id:subject:from:to
	:content-type; bh=2ko4uAKYG/8W2ntIodqeuQC+siMhlAP3ZQIumaFbU68=;
	b=H450zGV0IdpaN/wKmbgiGcprQ42pIOwuccBgJJq0NiMIDA7kPIV/lc7IjdpkXiYr36
	cqBe5DA9zMfSLfvYHo06xX4eDuKxY4XSCunbK9XqmsBBaNNhiFRb5crYLD88BANXHd3q
	cY+7pBWo/inDeWLvFYRKdypWqPyQ56ZvDa0xgTxBgrWPpP1yBFZkWIGiyORCvM7Smmga
	edEuJHXbsQPFC1tf1uzSKcGUZduBGokOtNK2EnVrqyBYvk1L1jDSSbAvc5xh9euRD5FU
	SnHsqGaaAf0QC4UtjcXePmKw8/K6mLdSBK7zpgY4eYh97TyS/WNn1owNV1PNQN9n01g3
	BvTA==
MIME-Version: 1.0
X-Received: by 10.25.4.214 with SMTP id 205mr28452069lfe.90.1452269194448;
	Fri, 08 Jan 2016 08:06:34 -0800 (PST)
Received: by 10.25.25.78 with HTTP; Fri, 8 Jan 2016 08:06:34 -0800 (PST)
In-Reply-To: <CABsx9T3MfndREm9icE-TUF58zsRZ5YsBMvUAMy4E-MmYWxWV=A@mail.gmail.com>
References: <CABsx9T3aTme2EQATamGGzeqNqJkUcPGa=0LVidJSRYNznM-myQ@mail.gmail.com>
	<CAPg+sBhH0MODjjp8Avx+Fy_UGqzMjUq_jn3vT3oH=u3711tsSA@mail.gmail.com>
	<8760z4rbng.fsf@rustcorp.com.au>
	<C4B5B9F1-9C53-45BC-9B30-F572C78096E3@mattcorallo.com>
	<8737u8qnye.fsf@rustcorp.com.au>
	<CABsx9T1gmz=sr_sEEuy8BQU6SXdmi58O30rzRWNW=0Ej98fi4A@mail.gmail.com>
	<20160108153329.GA15731@sapphire.erisian.com.au>
	<CABsx9T3MfndREm9icE-TUF58zsRZ5YsBMvUAMy4E-MmYWxWV=A@mail.gmail.com>
Date: Fri, 8 Jan 2016 11:06:34 -0500
Message-ID: <CABsx9T18zaQEG3ZvKG_=q7duF-+npvG=Y3DSDw8HV3JaZNNSWg@mail.gmail.com>
From: Gavin Andresen <gavinandresen@gmail.com>
To: Anthony Towns <aj@erisian.com.au>,
	Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Content-Type: multipart/alternative; boundary=001a113fb9f0741e350528d4c5a8
X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED,
	DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW
	autolearn=ham version=3.3.1
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
	smtp1.linux-foundation.org
X-Mailman-Approved-At: Fri, 08 Jan 2016 17:41:06 +0000
Subject: Re: [bitcoin-dev] Time to worry about 80-bit collision attacks or
	not?
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>,
	<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/>
List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org>
List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>,
	<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe>
X-List-Received-Date: Fri, 08 Jan 2016 16:06:37 -0000

--001a113fb9f0741e350528d4c5a8
Content-Type: text/plain; charset=UTF-8

On Fri, Jan 8, 2016 at 10:46 AM, Gavin Andresen <gavinandresen@gmail.com>
wrote:

> And Ethan or Anthony:  can you think of a similar attack scheme if you
> assume we had switched to Schnorr 2-of-2 signatures by then?


Don't answer that, I was being dense again, Anthony's scheme works with
Schnorr...


-- 
--
Gavin Andresen

--001a113fb9f0741e350528d4c5a8
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On F=
ri, Jan 8, 2016 at 10:46 AM, Gavin Andresen <span dir=3D"ltr">&lt;<a href=
=3D"mailto:gavinandresen@gmail.com" target=3D"_blank">gavinandresen@gmail.c=
om</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">And Ethan or Ant=
hony: =C2=A0can you think of a similar attack scheme if you assume we had s=
witched to Schnorr 2-of-2 signatures by then?</blockquote></div><br>Don&#39=
;t answer that, I was being dense again, Anthony&#39;s scheme works with Sc=
hnorr...<br><br clear=3D"all"><div><br></div>-- <br><div class=3D"gmail_sig=
nature">--<br>Gavin Andresen<br></div>
</div></div>

--001a113fb9f0741e350528d4c5a8--