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
91
|
Return-Path: <tony991@gmail.com>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
[172.17.192.35])
by mail.linuxfoundation.org (Postfix) with ESMTPS id DD36E3EE
for <bitcoin-dev@lists.linuxfoundation.org>;
Wed, 10 Aug 2016 07:53:03 +0000 (UTC)
X-Greylist: whitelisted by SQLgrey-1.7.6
Received: from mail-wm0-f44.google.com (mail-wm0-f44.google.com [74.125.82.44])
by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 53525AB
for <bitcoin-dev@lists.linuxfoundation.org>;
Wed, 10 Aug 2016 07:53:03 +0000 (UTC)
Received: by mail-wm0-f44.google.com with SMTP id i5so85033738wmg.0
for <bitcoin-dev@lists.linuxfoundation.org>;
Wed, 10 Aug 2016 00:53:03 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
h=mime-version:in-reply-to:references:from:date:message-id:subject:to;
bh=4bmXtr3t3AeOvcohL8K9hmwk8PsV4HJ01PZ77Y9D/98=;
b=XwdHAEbq/LFfP71aZmWVsXqTcRavanEXrNubFkI5qBFg/R3+VPbfg+Z1BKlxvkVQM5
CCcCYL5kc3nttcO1uANmp8Hy90Vqt8nfKhY+hiZ1iVPHXP4RQjPC/+I/S9wpyGhyFW87
ejPmDSXusIw0wx8kZYCNARb7X1iqWUPaHjX662jFIt0auoknPHl5alPv3WyfZHmHEHPs
WKR9m6SJu/Rqoi7xx4Gy7fwb0hno00JTS7BTXZPXaGBGabvoRJLDB4PVFbFO5N0ecW0s
Zn/FEggv/+5Yo5LB76Hc3CNUWtuzsgg09cerzc9WNQWGoEThtG1IwwCw0RLJCYCVmPSK
aGkQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20130820;
h=x-gm-message-state:mime-version:in-reply-to:references:from:date
:message-id:subject:to;
bh=4bmXtr3t3AeOvcohL8K9hmwk8PsV4HJ01PZ77Y9D/98=;
b=YUR7zHf9l2cJyK9E3bgutxa+6hCRUZtF2iLkigzHnobkePSisHg72RZGRgaMs9QAyx
2cAOPLdS7VVGWomjggXS3hkkfxaIEw57yFX5yECE5ASlw2bJ1H6X4G4AioiQH6A6MPZT
E8FzwmfdtzC44yifDKpWw7zK3DtnwoYiY2mVcaOS7Pw9W2y7VarHziCgAdYQTE7UxHR7
sQYByiJqCGOILbygkIsyIdTka/Fn0AOEBv0TMscGIkHhyf1jCuVTxq8aBjS23TohYJTb
+SHAQ5qthXxD7OBlyhv9btR5uUu9vz4YdJFE8NQFaWkfDoFgjr99qtWZmY2WN9o8a3EW
AgtQ==
X-Gm-Message-State: AEkoouuaJ2d8yQs/dC8blKa7xzQr/Y8esq1RT3qGU8jppxz08sdlMEXopbU6MoIaJKgPqfhtXZOGfh9UEiHziA==
X-Received: by 10.28.223.139 with SMTP id w133mr1781538wmg.90.1470815581812;
Wed, 10 Aug 2016 00:53:01 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.194.100.161 with HTTP; Wed, 10 Aug 2016 00:53:01 -0700 (PDT)
In-Reply-To: <CAL3p6zqdKgkFWSDZYqVERvX2iGyS3qaLZae-kDp3Y-s1rmB2Zg@mail.gmail.com>
References: <CAL3p6zpADtYFQnQUr3Efk6V59+K+bB3tPQQMGT9weiafU=43zA@mail.gmail.com>
<20160808154707.GB2196@banane.informatik.uni-ulm.de>
<CAL3p6zo1xBEu90MDHSK4TNX0DL2QXxq5vC48a2cFnX0JCD=RvQ@mail.gmail.com>
<CAH+Axy6yJ3WotKjsMjo3o23V5Du1nniu8Bzd3gxYX5OuqeB6gw@mail.gmail.com>
<CAL3p6zp5wcr4bK13n1F51XeKPahjUTNUziZq2MN7PRDA_BzGBg@mail.gmail.com>
<CAH+Axy7BAC14eGugDVsqkRv+XU+5dL4AAv_kb7PSi61825E70w@mail.gmail.com>
<CAL3p6zqdKgkFWSDZYqVERvX2iGyS3qaLZae-kDp3Y-s1rmB2Zg@mail.gmail.com>
From: Tony Churyumoff <tony991@gmail.com>
Date: Wed, 10 Aug 2016 10:53:01 +0300
Message-ID: <CAL3p6zrYwxFRC5JctwKsLwEzENWL0B2iUgO3crubaYkc=m5SdQ@mail.gmail.com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Content-Type: text/plain; charset=UTF-8
X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,
DKIM_VALID,DKIM_VALID_AU,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,
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
X-Mailman-Approved-At: Wed, 10 Aug 2016 14:53:25 +0000
Subject: [bitcoin-dev] Fwd: Hiding entire content of on-chain transactions
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: Wed, 10 Aug 2016 07:53:04 -0000
This troll is harmless. A duplicate spend proof should also be signed
by the same user (Alice, in your example) to be considered a double
spend.
2016-08-09 3:18 GMT+03:00 James MacWhyte <macwhyte@gmail.com>:
> One more thought about why verification by miners may be needed.
>
> Let's say Alice sends Bob a transaction, generating output C.
>
> A troll, named Timothy, broadcasts a transaction with a random hash,
> referencing C's output as its spend proof. The miners can't tell if it's
> valid or not, and so they include the transaction in a block. Now Bob's
> money is useless, because everyone can see the spend proof referenced and
> thinks it has already been spent, even though the transaction that claims it
> isn't valid.
>
> Did I miss something that protects against this?
>
|
