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author | Peter Todd <pete@petertodd.org> | 2017-04-05 22:49:10 -0400 |
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committer | bitcoindev <bitcoindev@gnusha.org> | 2017-04-06 02:49:16 +0000 |
commit | 662ee6721f5990e90e6e827712afcb1aac7b7005 (patch) | |
tree | 0467965d81335bb04422b21f0466820510dace52 | |
parent | 81c71676dbf838a6fccab66a73603fd0b453f2d1 (diff) | |
download | pi-bitcoindev-662ee6721f5990e90e6e827712afcb1aac7b7005.tar.gz pi-bitcoindev-662ee6721f5990e90e6e827712afcb1aac7b7005.zip |
Re: [bitcoin-dev] BIP proposal: Inhibiting a covert attack on the Bitcoin POW function
-rw-r--r-- | 5e/a1f913446526ffd3ba413fc5b1d085c8ac6de0 | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/5e/a1f913446526ffd3ba413fc5b1d085c8ac6de0 b/5e/a1f913446526ffd3ba413fc5b1d085c8ac6de0 new file mode 100644 index 000000000..c2d3c70a9 --- /dev/null +++ b/5e/a1f913446526ffd3ba413fc5b1d085c8ac6de0 @@ -0,0 +1,134 @@ +Return-Path: <pete@petertodd.org> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id AB394516 + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 6 Apr 2017 02:49:16 +0000 (UTC) +X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 +Received: from outmail149101.authsmtp.com (outmail149101.authsmtp.com + [62.13.149.101]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id E06C1187 + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 6 Apr 2017 02:49:15 +0000 (UTC) +Received: from mail-c247.authsmtp.com (mail-c247.authsmtp.com [62.13.128.247]) + by punt24.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v362nDvH058674; + Thu, 6 Apr 2017 03:49:13 +0100 (BST) +Received: from petertodd.org (ec2-52-5-185-120.compute-1.amazonaws.com + [52.5.185.120]) (authenticated bits=0) + by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v362nB5V063863 + (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); + Thu, 6 Apr 2017 03:49:12 +0100 (BST) +Received: from [127.0.0.1] (localhost [127.0.0.1]) + by petertodd.org (Postfix) with ESMTPSA id 38420400FF; + Thu, 6 Apr 2017 02:49:11 +0000 (UTC) +Received: by localhost (Postfix, from userid 1000) + id 9F612205F6; Wed, 5 Apr 2017 22:49:10 -0400 (EDT) +Date: Wed, 5 Apr 2017 22:49:10 -0400 +From: Peter Todd <pete@petertodd.org> +To: Bram Cohen <bram@bittorrent.com> +Message-ID: <20170406024910.GA1271@savin.petertodd.org> +References: <CAAS2fgR84898xD0nyq7ykJnB7qkdoCJYnFg6z5WZEUu0+-=mMA@mail.gmail.com> + <20170406023123.GA1071@savin.petertodd.org> + <CA+KqGkqSxeAUZFVFqM_QkEWcGFHgZXwGuOE==7HpXp1+D_Tj3Q@mail.gmail.com> +MIME-Version: 1.0 +Content-Type: multipart/signed; micalg=pgp-sha256; + protocol="application/pgp-signature"; boundary="opJtzjQTFsWo+cga" +Content-Disposition: inline +In-Reply-To: <CA+KqGkqSxeAUZFVFqM_QkEWcGFHgZXwGuOE==7HpXp1+D_Tj3Q@mail.gmail.com> +User-Agent: Mutt/1.5.23 (2014-03-12) +X-Server-Quench: 9dbd4ee7-1a73-11e7-bcdf-0015176ca198 +X-AuthReport-Spam: If SPAM / abuse - report it at: + http://www.authsmtp.com/abuse +X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR + aQdMdgQUGUUGAgsB AmEbW1deVFR7WGE7 bghPaBtcak9QXgdq + T0pMXVMcUgZuA0Jz A3geVBp6cQYIeX5w Y04sVyQJCEAvIEFg + Qx9TFnAHZDJndTJM BBZFdwNVdQJNeEwU a1l3GhFYa3VsNCMk + FAgyOXU9MCtqYA50 ekkVN1UKRl0CGmx0 ZhYCHD8uAUwDSG06 + ZxchNFMGAA4YLlk7 OlhpXlRQLx8faEV0 Hl1GBy5fb2EmeGIl EAVRQU8ZFlUA +X-Authentic-SMTP: 61633532353630.1038:706 +X-AuthFastPath: 0 (Was 255) +X-AuthSMTP-Origin: 52.5.185.120/25 +X-AuthVirus-Status: No virus detected - but ensure you scan with your own + anti-virus system. +X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,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 +Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org> +Subject: Re: [bitcoin-dev] BIP proposal: Inhibiting a covert attack on the + Bitcoin POW function +X-BeenThere: bitcoin-dev@lists.linuxfoundation.org +X-Mailman-Version: 2.1.12 +Precedence: list +List-Id: Bitcoin Protocol 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: Thu, 06 Apr 2017 02:49:16 -0000 + + +--opJtzjQTFsWo+cga +Content-Type: text/plain; charset=us-ascii +Content-Disposition: inline +Content-Transfer-Encoding: quoted-printable + +On Wed, Apr 05, 2017 at 07:39:08PM -0700, Bram Cohen wrote: +> On Wed, Apr 5, 2017 at 7:31 PM, Peter Todd via bitcoin-dev < +> > While I'm in favour of blocking covert usage of ASICBOOST, there's every +> > reason +> > to block non-covert usage of it as well. In a low margin business like +> > mining, +> > the advatange it gives is enormous - quite possibly 10x your profit mar= +gin +> > - +> > and given that barrier free access to being able to purchase ASICs is +> > already +> > an archilles heal for Bitcoin there is every reason to eliminate this l= +egal +> > vulnerability. Additionally, it's a technical vulnerability as well: we +> > want +> > getting into the ASIC manufacturing and design business to have as low +> > barriers +> > to entry as is feasible, and the ASICBOOST exploit significantly increa= +ses +> > the +> > minimum capital requirements to do so. +> > +>=20 +> Asicboost also has the problem that it isn't treating the hashing as a +> black box, and thus has impacts on what gets mined. In particular it +> creates an incentive to make blocks smaller. That's a very unwanted effec= +t, +> and anything like it should be engineered out on principle. + +Agreed! There's no benefit to Bitcoin for having it - one way or the other +miners are going to destroy ~12BTC/block worth of energy. Meanwhile it appe= +ars +to have lead to something like a year of stupid political bullshit based on= + a +secret advantage - there's no reason to invite a repeat of this episode. + +--=20 +https://petertodd.org 'peter'[:-1]@petertodd.org + +--opJtzjQTFsWo+cga +Content-Type: application/pgp-signature; name="signature.asc" +Content-Description: Digital signature + +-----BEGIN PGP SIGNATURE----- + +iQEcBAEBCAAGBQJY5ayhAAoJECSBQD2l8JH7N2wH/1neYHE9o5XsU/C/Go8X7Si6 +qko+vZI2yBLpO5fbDvNFtOSDhe5s5xo7baZcvPiwPDi/kCuZUL6M4i/sKEQObSl6 +ZDah2OkWq7A5QMaORA9cNAWO8n5SwC+O3DeuJQHd1pA5LwypvLcvLf2zBCSODTgr +TF+wCgyPA9/NpPmTEVmC5Cu/F0FNA7/lppfzVjAH9KztQEACVATpD7m6n3qZZ0GX +3q0SORFnNGJ9BjVfBehVpKnb/aMG63qYfQ61X9CDFpktLRFgP0nMUjkhPj3RP/FC +sFdB5Lnc7qod/qX0qHcOs5IZFpHBzxFZxCutNl5bRybP6ix2YuUcrW1T3++PBIE= +=kBPD +-----END PGP SIGNATURE----- + +--opJtzjQTFsWo+cga-- + |