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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
Return-Path: <earonesty@gmail.com>
Received: from smtp1.osuosl.org (smtp1.osuosl.org [IPv6:2605:bc80:3010::138])
by lists.linuxfoundation.org (Postfix) with ESMTP id 9B29DC000B
for <bitcoin-dev@lists.linuxfoundation.org>;
Mon, 22 Mar 2021 12:05:25 +0000 (UTC)
Received: from localhost (localhost [127.0.0.1])
by smtp1.osuosl.org (Postfix) with ESMTP id 7BA8082D03
for <bitcoin-dev@lists.linuxfoundation.org>;
Mon, 22 Mar 2021 12:05:25 +0000 (UTC)
X-Virus-Scanned: amavisd-new at osuosl.org
X-Spam-Flag: NO
X-Spam-Score: -1.399
X-Spam-Level:
X-Spam-Status: No, score=-1.399 tagged_above=-999 required=5
tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1,
FREEMAIL_FORGED_FROMDOMAIN=0.25, FREEMAIL_FROM=0.001,
HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_NONE=-0.0001,
SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=no autolearn_force=no
Authentication-Results: smtp1.osuosl.org (amavisd-new);
dkim=pass (2048-bit key) header.d=q32-com.20150623.gappssmtp.com
Received: from smtp1.osuosl.org ([127.0.0.1])
by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id GetcGRv0iNv8
for <bitcoin-dev@lists.linuxfoundation.org>;
Mon, 22 Mar 2021 12:05:24 +0000 (UTC)
X-Greylist: whitelisted by SQLgrey-1.8.0
Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com
[IPv6:2607:f8b0:4864:20::52c])
by smtp1.osuosl.org (Postfix) with ESMTPS id A8F6F82CEC
for <bitcoin-dev@lists.linuxfoundation.org>;
Mon, 22 Mar 2021 12:05:24 +0000 (UTC)
Received: by mail-pg1-x52c.google.com with SMTP id o11so8472034pgs.4
for <bitcoin-dev@lists.linuxfoundation.org>;
Mon, 22 Mar 2021 05:05:24 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=q32-com.20150623.gappssmtp.com; s=20150623;
h=mime-version:references:in-reply-to:from:date:message-id:subject:to
:cc; bh=9WrU2qbU9ZWv0LA7GHsZSFwGB3kUdLsDKnrkJ+RPaV8=;
b=qpAw0Z2w6aZTL4JU+x1RqH8LaTvIgRDWBQ/BUL9SFP7QSs6uUp0Dde48NGuIIKX11x
t91/duRZITdd/RauiMKE+fZt9nB5rhaWZ8Ig+JfLD6d9CQs6DTF3wFXiynXNFBMW0aJm
LnwQH7u7iRDaOsZsodIWDvuxk4LJqbJf2hcjz8GNWhLHTt9OhD+ciujHIAHP1Le13Czo
kscIWQ1uuU8vtonOleD2a1IeJ0e1HFme+9IW4t20Rh30/WQwXVTC9MQBsSdu7U/RaRIQ
ZluOCJrL4nFrOLdQ8tUlgyeyBxXTA5AjTHgZ2zA0+bgzW9E0kc023c//E6ulswHyHukY
jeAQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20161025;
h=x-gm-message-state:mime-version:references:in-reply-to:from:date
:message-id:subject:to:cc;
bh=9WrU2qbU9ZWv0LA7GHsZSFwGB3kUdLsDKnrkJ+RPaV8=;
b=GukUNgCgLp3oBT00kQFlweQCEM+EqbWKv6QRcXIrrHx5RESxlAeoizI04THT8EB7F3
VzVoevv49JP/4Ip81tvjdv5GH6OTraKF4eE/vK92JBuDok4tW+O2AqGaBLz6Ab3LS8Eq
FGOmGUZW8LzLfOWiBc9TNdcS2wdosDP5/zc+TjqOYIaZyfD2tocwX/N/Qio/2O9wJlD1
eWDZ2se2GgRCrbOO6GJqoiLkw+RVke2aKRO0Hu/Kxc0bi4/RaxyDEwTzV60oZvpSyUND
Pd8lFTaHi6UOSHwd0sJd/67MRwdXGj4pBtNWZEkOH+JuMqSKcCsQlJ+YTDPtePfk0szG
PVUA==
X-Gm-Message-State: AOAM530r5yPaZ6GcqiMuFYdbi8Ijq67QUA1CIWUPr9elC4PZBbT6MSGH
ELqEGFKXsn0bGvpLyaLpeP3wP5E/cXPIOpG6fTm7fsYq3yL1
X-Google-Smtp-Source: ABdhPJxllFrxXFApQleVTckD8Df+ga6HoJzzKqMYsHqPw48BI1qJuLIarVD653Y79isQWhTOzaKBN4wXcZrmawqvQfE=
X-Received: by 2002:a63:c807:: with SMTP id z7mr10686066pgg.363.1616414723965;
Mon, 22 Mar 2021 05:05:23 -0700 (PDT)
MIME-Version: 1.0
References: <125859088-3f93e6aca40d5c3244243540270cdb84@pmq7v.m5r2.onet>
<CAJowKg+DHsJR4eeHbYgwe79C-U9WZ1-iUyxNLxw9EfD6mQQLBw@mail.gmail.com>
<23C3AD3A-DB4B-4E0B-9280-2F102CA43703@arik.io>
In-Reply-To: <23C3AD3A-DB4B-4E0B-9280-2F102CA43703@arik.io>
From: Erik Aronesty <erik@q32.com>
Date: Mon, 22 Mar 2021 08:05:13 -0400
Message-ID: <CAJowKgJtF3m0-WnMYMhn=wgxk6zsmxpLuftc=nsSqCgKKX-w4Q@mail.gmail.com>
To: linuxfoundation@arik.io
Content-Type: text/plain; charset="UTF-8"
X-Mailman-Approved-At: Mon, 22 Mar 2021 12:30:52 +0000
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] An alternative to BIP 32?
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.15
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: Mon, 22 Mar 2021 12:05:25 -0000
yes that would be fine. not sure what your objection to sha3 is tho
(more provably secure) - i guess sticking with bitcoin-lib stuff tho.
On Fri, Mar 19, 2021 at 10:08 PM Arik Sosman <me@arik.io> wrote:
>
> Hi Erik,
>
> Would sha256-hmac(nonce, publicKeyPoint) still be a suitable/safe alternative without relying on sha3? That should at the very least eliminate length extension attacks.
>
> Best,
> Arik
>
> > On Mar 19, 2021, at 6:32 PM, Erik Aronesty via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
> >
> > use sha3-256. sha256 suffers from certain attacks (length extension,
> > for example) that could make your scheme vulnerable to leaking info,
> > depending on how you concatenate things, etc. better to choose
> > something where padding doesn't matter.
> >
> > On Fri, Mar 19, 2021 at 7:28 PM vjudeu via bitcoin-dev
> > <bitcoin-dev@lists.linuxfoundation.org> wrote:
> >>
> >> I recently found some interesting and simple HD wallet design here: https://bitcointalk.org/index.php?topic=5321992.0
> >> Could anyone see any flaws in such design or is it safe enough to implement it and use in practice?
> >> If I understand it correctly, it is just pure ECDSA and SHA-256, nothing else:
> >>
> >> masterPublicKey = masterPrivateKey * G
> >> masterChildPublicKey = masterPublicKey + ( SHA-256( masterPublicKey || nonce ) mod n ) * G
> >> masterChildPrivateKey = masterPrivateKey + ( SHA-256( masterPublicKey || nonce ) mod n )
> >>
> >> Also, it has some nice properties, like all keys starting with 02 prefix and allows potentially unlimited custom derivation path by using 256-bit nonce.
> >> _______________________________________________
> >> bitcoin-dev mailing list
> >> bitcoin-dev@lists.linuxfoundation.org
> >> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
> > _______________________________________________
> > bitcoin-dev mailing list
> > bitcoin-dev@lists.linuxfoundation.org
> > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
|
