Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id F2BAF1056 for ; Sun, 18 Mar 2018 18:59:36 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-io0-f175.google.com (mail-io0-f175.google.com [209.85.223.175]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 5C73B5F2 for ; Sun, 18 Mar 2018 18:59:36 +0000 (UTC) Received: by mail-io0-f175.google.com with SMTP id b20so1507723iof.5 for ; Sun, 18 Mar 2018 11:59:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=voskuil-org.20150623.gappssmtp.com; s=20150623; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=E+NfsxnxDghOBadhMrYJmeLiaOnqM1nWE6pECAbIcbM=; b=wFWMK1m5G035muFktOvGyTs3cF8sWFaVdlvMyHzQH6+3SGwnRFlOPFMvEcO/ROqOaI 87kznHah5G2FQJNI70ftMf0rgsfuRR9+9/Wd4v9sA6luJyZcx7B377b/xZFaArYgWqbE n88wHzMgCCSGAY3yAGUYjfw11CzN6jJJanDkq1S4uO2rbfCPhJEqTb1vSDYhwU1ZIESI I09FE+gIwghi0V2jgXTxfHx/tAQYv/z+0oN6SKFz764xwSjViTyjZ8Bmtp/6LCdJAT1i igxQUd6TbAzG+RpoLQz7vUw2DUfBcu9CRZUOKeFXcfwyKTY4mck/2gVtNg+mgURdCYjB hvEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=E+NfsxnxDghOBadhMrYJmeLiaOnqM1nWE6pECAbIcbM=; b=qxLM5RzAMR4gylI1atqaDJyJOignvkoVw2hvu8x+E01/uvnXW8P9atTIDohqrZHJ48 VIulOGLBoHHRWlu37pYvIRr4KjC1OxTBwlFLrGhEdy6wqrFwCGYchRc9uiFj9gL1kg5X vjaCf9oQ+PShzrWk88E+NHXGhjfdQQHPy3m+95vWjVIqYgCeFpDvvKsCUr2JtUsyQrhQ A+kr/awfNcO/dsd4uS+fwQwVC8sdh/G3a+8YIGTySQB5GZpxlPR0uQMDSyms/dKU8WOK 2nY3awGnkWZ0/WaG8u1LOoT38Hiv+ua5v/j3r+96UQnDO65h04OpZXWR2vN86rSY39fn eb6A== X-Gm-Message-State: AElRT7Gp2lxaHfLP2vF/o5YbHPU8LPtrm5G9wVwSrgSqqQIPyBHD7Agt 9SZu7GR4dYo3mMg57zkO+hrfsw== X-Google-Smtp-Source: AG47ELv1x4+gP3vEgngDZeNsP7FcdovVglsi31jI2P21oUl9w6Z531U7EGtPLgPuCsew2gSMJLH5+A== X-Received: by 10.107.161.66 with SMTP id k63mr4179098ioe.19.1521399575733; Sun, 18 Mar 2018 11:59:35 -0700 (PDT) Received: from [172.19.131.118] ([12.130.119.132]) by smtp.gmail.com with ESMTPSA id q9sm6910696iod.49.2018.03.18.11.59.33 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 18 Mar 2018 11:59:34 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (1.0) From: Eric Voskuil X-Mailer: iPhone Mail (15D100) In-Reply-To: <874lleexud.fsf@eklitzke.org> Date: Sun, 18 Mar 2018 19:59:28 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: References: <874lleexud.fsf@eklitzke.org> To: Evan Klitzke , Bitcoin Protocol Discussion X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, MIME_QP_LONG_LINE, 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 X-Mailman-Approved-At: Wed, 21 Mar 2018 13:25:48 +0000 Subject: Re: [bitcoin-dev] feature: Enhance privacy by change obfuscation 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: Sun, 18 Mar 2018 18:59:37 -0000 > This would be really expensive for the network due to the bloat in UTXO si= ze, a cost everyone has to pay for. Without commenting on the merits of this proposal, I=E2=80=99d just like to c= orrect this common misperception. There is no necessary additional cost to t= he network from the count of unspent outputs. This perception arises from an= implementation detail of particular node software. There is no requirement f= or redundant indexing of unspent outputs. e=