From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id EDCD271F for ; Thu, 6 Apr 2017 21:38:38 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-vk0-f45.google.com (mail-vk0-f45.google.com [209.85.213.45]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id CB312255 for ; Thu, 6 Apr 2017 21:38:33 +0000 (UTC) Received: by mail-vk0-f45.google.com with SMTP id z204so56263454vkd.1 for ; Thu, 06 Apr 2017 14:38:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to; bh=muoqrTK5m3bFLFR8RATAgzF7yTuxnyt2dhpsW+BzajE=; b=SMQPUegLrOcAaUp7N+QrITPHCuK2NJ8MEYU0hsBBpLpxzP8JMMAG+sQGFd+qdkxJ3N 2VvxUiguCJwsBZxA3J7gEP/5q1nK2VUXvYVEsyu3HZ5bK5n9eIhe72kB35dvBSkwQA6V BJ8NcqrO8gHDGLIrVXE19/ubP7T9ke0IWNe54pJB8hDHoEtYL4ks2tEK+0vFiMc9X2ud dh2dxBNDbalQvdWdedf5g3vOLg67eE2t5Ms5rcov8gkcWFhJCwJbQyhRnJEimseEuiM2 SbooXPA9oqbY9utrR0MIceKdP+glWb7i53UBBvxF1M2/VB10v1h6T6D+wdKKUMmRKoN2 J8oA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to; bh=muoqrTK5m3bFLFR8RATAgzF7yTuxnyt2dhpsW+BzajE=; b=aLYBHW7xnNE3m9hN8rrjHvih9gUw2kVQ9uXb9hHh3BPXRAatRbLyUP2oLS+Z8MMqZb LjacWGCJHnDXX+BRVNAOG8iRjJPSRl/qdaS+zRHONKTdrFnehKdRh6Sl5sLhsRNMRjHE NroT8ADT6v2TAgbSB6LQaN02GoxDp2my3c8XNboBOBOPqGUK1Z8YVseyKUJ0REijr56D 3QnEM0frGDrjhupc4dGJiy3MexPt2FMioJrE+gUyGeHPQoyPB9CuhtKWIXUmz1+BLFMS LSA/AA/ZPml2QLIaYUE9lVZ51b0R9Fen9YKCyfi5Yr/Wc0UBp7bQxhmOHDggDy4avCM+ XzfA== X-Gm-Message-State: AFeK/H3QbfwSBfXAPugjKvQg/MBILoCaRuYqObH8BpNO+ZzB3xCEEOA61VbXe7/fMn+k0uts3QqVC1mqq2bDDA== X-Received: by 10.176.65.196 with SMTP id 62mr19808145uap.82.1491514711826; Thu, 06 Apr 2017 14:38:31 -0700 (PDT) MIME-Version: 1.0 Sender: gmaxwell@gmail.com Received: by 10.103.152.203 with HTTP; Thu, 6 Apr 2017 14:38:31 -0700 (PDT) In-Reply-To: References: From: Gregory Maxwell Date: Thu, 6 Apr 2017 21:38:31 +0000 X-Google-Sender-Auth: DMaI17vR-mHyfJ14K55z0Xd2A-A Message-ID: To: Bitcoin Dev Content-Type: text/plain; charset=UTF-8 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE 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] 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 21:38:39 -0000 On Wed, Apr 5, 2017 at 9:37 PM, Gregory Maxwell wrote: > each block MUST either contain a BIP-141 segwit commitment or a > correct WTXID commitment with ID 0xaa21a9ef. It was just pointed out to me that the proposed ID (which I just selected to be above the segwit one) collides with one chosen in another non-BIP proposal. This wasn't intentional, and I'll happily change the value when I update the document.