1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
Return-Path: <eric@voskuil.org>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
[172.17.192.35])
by mail.linuxfoundation.org (Postfix) with ESMTPS id F2BAF1056
for <bitcoin-dev@lists.linuxfoundation.org>;
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 <bitcoin-dev@lists.linuxfoundation.org>;
Sun, 18 Mar 2018 18:59:36 +0000 (UTC)
Received: by mail-io0-f175.google.com with SMTP id b20so1507723iof.5
for <bitcoin-dev@lists.linuxfoundation.org>;
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 <eric@voskuil.org>
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: <BCD26605-01B0-437C-8D4A-68DA52055AFB@voskuil.org>
References: <PS2P216MB0179FCA8077AAE946BFA2D069DD50@PS2P216MB0179.KORP216.PROD.OUTLOOK.COM>
<874lleexud.fsf@eklitzke.org>
To: Evan Klitzke <evan@eklitzke.org>,
Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
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 <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: 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=
|