Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id EBB33256 for ; Wed, 11 May 2016 14:29:04 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from zinan.dashjr.org (zinan.dashjr.org [192.3.11.21]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 837811A7 for ; Wed, 11 May 2016 14:29:04 +0000 (UTC) Received: from ishibashi.localnet (unknown [IPv6:2001:470:5:265:61b6:56a6:b03d:28d6]) (Authenticated sender: luke-jr) by zinan.dashjr.org (Postfix) with ESMTPSA id CA9B038A17CC; Wed, 11 May 2016 14:28:26 +0000 (UTC) X-Hashcash: 1:25:160511:bitcoin-dev@lists.linuxfoundation.org::wxQW=25Ul=dMlab6:dntz X-Hashcash: 1:25:160511:sergio.d.lerner@gmail.com::Xzgai1MJ8qhZm3Yy:aZr5g X-Hashcash: 1:25:160511:tier.nolan@gmail.com::MCrerj8MyTpMpLwJ:aN/7K From: Luke Dashjr To: bitcoin-dev@lists.linuxfoundation.org, Sergio Demian Lerner Date: Wed, 11 May 2016 14:28:24 +0000 User-Agent: KMail/1.13.7 (Linux/4.1.18-gentoo; KDE/4.14.16; x86_64; ; ) References: <20160510185728.GA1149@fedora-21-dvm> In-Reply-To: X-PGP-Key-Fingerprint: E463 A93F 5F31 17EE DE6C 7316 BD02 9424 21F4 889F X-PGP-Key-ID: BD02942421F4889F X-PGP-Keyserver: hkp://pgp.mit.edu MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <201605111428.25918.luke@dashjr.org> X-Spam-Status: No, score=-3.3 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Subject: Re: [bitcoin-dev] Making AsicBoost irrelevant 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: Wed, 11 May 2016 14:29:05 -0000 On Wednesday, May 11, 2016 12:20:55 PM Sergio Demian Lerner via bitcoin-dev wrote: > On Tue, May 10, 2016 at 6:43 PM, Sergio Demian Lerner < > sergio.d.lerner@gmail.com> wrote: > > You can find it here: > > https://bitslog.wordpress.com/2014/03/18/the-re-design-of-the-bitcoin-blo > > ck-header/ > > > > Basically, the idea is to put in the first 64 bytes a 4 byte hash of the > > second 64-byte chunk. That design also allows increased nonce space in > > the first 64 bytes. > > My mistake here. I didn't recalled correctly my own idea. The idea is to > include in the second 64-byte chunk a 4-byte hash of the first chunk, not > the opposite. What if we XOR bytes 64..76 with the first 12 bytes of the SHA2 midstate? Would that work? Luke