Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 77EB1A88 for ; Thu, 6 Apr 2017 03:42:47 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail149077.authsmtp.com (outmail149077.authsmtp.com [62.13.149.77]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id BF6F019C for ; Thu, 6 Apr 2017 03:42:46 +0000 (UTC) Received: from mail-c232.authsmtp.com (mail-c232.authsmtp.com [62.13.128.232]) by punt24.authsmtp.com (8.14.2/8.14.2/) with ESMTP id v363ghY1059784; Thu, 6 Apr 2017 04:42:43 +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 v363gf2w067977 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 6 Apr 2017 04:42:42 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by petertodd.org (Postfix) with ESMTPSA id 361F2400FF; Thu, 6 Apr 2017 03:42:41 +0000 (UTC) Received: by localhost (Postfix, from userid 1000) id 81BB1205F6; Wed, 5 Apr 2017 23:42:40 -0400 (EDT) Date: Wed, 5 Apr 2017 23:42:40 -0400 From: Peter Todd To: David Vorick Message-ID: <20170406034240.GA1603@savin.petertodd.org> References: <20170406023123.GA1071@savin.petertodd.org> <20170406024910.GA1271@savin.petertodd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="bg08WKrSYDhXBjb5" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) X-Server-Quench: 172647a6-1a7b-11e7-829f-00151795d556 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aQdMdgQUGUUGAgsB AmEbW1BeVF97XWE7 bghPaBtcak9QXgdq T0pMXVMcUgZuAktX BFkeVB57cAIIcHZ5 ZwhjWXJdWEMrc1t8 E0kGCGwHMGB9YGIW Bl1YdwJRcQRDe0tA b1YxNiYHcQ5VPz4z GA41ejw8IwAXAgVt ChkXKkoVWk8PTHYd QRADFzQzHEsKDyx7 JBs4J0QAVE8NLkw5 MhMmXxoEMxJwQidf A0pKASkRH34+DyQ2 CwhGXEkYeAAA X-Authentic-SMTP: 61633532353630.1037:706 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 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 06 Apr 2017 03:42:47 -0000 --bg08WKrSYDhXBjb5 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Apr 05, 2017 at 11:23:22PM -0400, David Vorick wrote: > I urge everybody to realize how difficult something like this is going to > be to pull off. We are literally talking about invalidating hardware (or = at > least the optimized bits). It's only going to succeed if everybody is > conclusively on board. As you consider proposals, realize that anything > which is not the simplest and least contentious is already dead. One of the things going for us here is that Bitmain has been keeping ASICBO= OST =66rom their own customers - as far as we know they haven't been sharing it= , and thus they're the only ones you can actually use it. So while we're pissing off Bitmain in disabling it, we wouldn't be affecting anyone else. Equally, mining is a zero-sum game: if no-one can use ASICBOOST, miners are= in the same position as before. ASICBOOST is only relevant to miners like Bitm= ain who have access to it while other miners don't. --=20 https://petertodd.org 'peter'[:-1]@petertodd.org --bg08WKrSYDhXBjb5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJY5bksAAoJECSBQD2l8JH7L6sH/1j9hegDcV71bDkcZB3WphBQ pqYPu1xZ5VbwB6fbGaAyWNz8nmo4TV4YuWT2A2ieYDwQmAYVkkk4Z0hnIjcf8/Ol 0SteiByRNiY31MptM9F2gvfdXVfj9MhFyX6PG1JUiDnVgIg6tkkFe9rEhpF1tawA 3zqzbQGUArqVSVONrpKrw0pf5S037GgoK5bOv7e0hB907qP8RmcXkAKTXy/rHsQ3 iGga6WTfDsMQ+YnpjQcBNS8LdB2tdOvwIjMTMWSDzsPK7oWGdWwiP7S8p5y+Elm6 y3enbG4bZT3zTgJsR5d1MUHSO/XEQZVzNBzf3biScemvioskHUtRiCN5VWje6UM= =YtvO -----END PGP SIGNATURE----- --bg08WKrSYDhXBjb5--