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
|
Return-Path: <henning.kopp@uni-ulm.de>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
[172.17.192.35])
by mail.linuxfoundation.org (Postfix) with ESMTPS id 25158E9A
for <bitcoin-dev@lists.linuxfoundation.org>;
Tue, 9 Feb 2016 13:19:36 +0000 (UTC)
X-Greylist: delayed 00:07:07 by SQLgrey-1.7.6
Received: from smtp.uni-ulm.de (smtp.uni-ulm.de [134.60.1.26])
by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 0FD19120
for <bitcoin-dev@lists.linuxfoundation.org>;
Tue, 9 Feb 2016 13:19:34 +0000 (UTC)
X-Virus-Scanned: amavisd-new at uni-ulm.de
Received: from banane.informatik.uni-ulm.de (banane.informatik.uni-ulm.de
[134.60.77.114]) (authenticated bits=0)
by mail.uni-ulm.de (8.14.9/8.14.9) with ESMTP id u19DCKqY006081
(version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=NOT)
for <bitcoin-dev@lists.linuxfoundation.org>;
Tue, 9 Feb 2016 14:12:22 +0100 (CET)
Date: Tue, 9 Feb 2016 14:12:15 +0100
From: Henning Kopp <henning.kopp@uni-ulm.de>
To: bitcoin-dev@lists.linuxfoundation.org
Message-ID: <20160209131215.GE2329@banane.informatik.uni-ulm.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.5.24 (2015-08-30)
X-DCC-EATSERVER-Metrics: poseidon 1166; Body=1 Fuz1=1 Fuz2=1
X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE,
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
X-Mailman-Approved-At: Tue, 09 Feb 2016 21:57:09 +0000
Subject: [bitcoin-dev] Question regarding Confidential Transactions
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Bitcoin Development 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: Tue, 09 Feb 2016 13:19:36 -0000
Hi all,
I am trying to fully grasp confidential transactions.
When a sender creates a confidential transaction and picks the blinding
values correctly, anyone can check that the transaction is valid. It
remains publically verifiable.
But how can the receiver of the transaction check which amount was
sent to him?
I think he needs to learn the blinding factor to reveal the commit
somehow off-chain. Am I correct with this assumption?
If yes, how does this work?
All the best
Henning
--
Henning Kopp
Institute of Distributed Systems
Ulm University, Germany
Office: O27 - 3402
Phone: +49 731 50-24138
Web: http://www.uni-ulm.de/in/vs/~kopp
|
