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
|
Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193]
helo=mx.sourceforge.net)
by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76)
(envelope-from <eric@voskuil.org>) id 1YIM0n-0006rK-2o
for bitcoin-development@lists.sourceforge.net;
Mon, 02 Feb 2015 18:46:17 +0000
X-ACL-Warn:
Received: from mail-pa0-f44.google.com ([209.85.220.44])
by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128)
(Exim 4.76) id 1YIM0m-0006nW-1P
for bitcoin-development@lists.sourceforge.net;
Mon, 02 Feb 2015 18:46:17 +0000
Received: by mail-pa0-f44.google.com with SMTP id rd3so85528712pab.3
for <bitcoin-development@lists.sourceforge.net>;
Mon, 02 Feb 2015 10:46:10 -0800 (PST)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20130820;
h=x-gm-message-state:references:mime-version:in-reply-to:content-type
:content-transfer-encoding:message-id:cc:from:subject:date:to;
bh=4zBn0ykEs2CMhLXMqXm8Ntc8Qc+y/hsnU4hVn32EoLQ=;
b=FjbaBVaHs8S/1UPJ4SR1317CaRaEg7FhIEDI2444e6oqAkw9ZFbRea2G5CQTTbhLNL
+fM5vkorVOI/oAt5jgAmd/UPAd9qm6WqlZw8QL5xz+XA3hol/uD2/okAFjQ+4/Iasf5x
yw3WNx4hVpinL3MoA3bab55dvKKZWGZIyVtQD5K5QyMypdv+NRn7FsIOvluxZARbaf9o
OqjbaBTHAuLoT7CjIzVKcUL/EZFNnzaUIxHdOXLmL8oMU/D3y5yl9LJQ/fDENNEOgkZk
SfTllypQwSGCxco/tnpMhVJR+NBOl+XYWjBgs0+IcqDhDyxUfWP4xHmmoNMJaFfCG0zy
qfyg==
X-Gm-Message-State: ALoCoQnUW7jV4q7c1AwUIaGWxVu3pOggrnhOfcN+pRPMm8weEteOlbqMs7aGyxqjT8c1oU+cRSD3
X-Received: by 10.66.249.133 with SMTP id yu5mr31680824pac.116.1422902770211;
Mon, 02 Feb 2015 10:46:10 -0800 (PST)
Received: from [10.85.245.255] (mobile-166-171-123-207.mycingular.net.
[166.171.123.207]) by mx.google.com with ESMTPSA id
g11sm19767896pat.24.2015.02.02.10.46.07
(version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128);
Mon, 02 Feb 2015 10:46:09 -0800 (PST)
References: <27395C55-CF59-4E65-83CA-73F903272C5F@gmail.com>
<54CE3816.6020505@bitwatch.co>
<68C03646-02E7-43C6-9B73-E4697F3AA5FD@gmail.com>
<CALkkCJbk0czFj5mdMB6_0+Umw5V-fo-4tdBHgvg92zhyRZWiYQ@mail.gmail.com>
<CANEZrP0QjPm+TTgV9Fh84vt2zLaGp0R2Wt2ZL2ZXYhxzOFPHVA@mail.gmail.com>
<CALkkCJYuM_T=_nfBOCF4S8XhVecUZA0ug==Y_n+qdFpb-F628g@mail.gmail.com>
<CANEZrP1QZqP6wSxcNJt81c4=xXLJsEsPF-CN71NZzwdOFSpB2A@mail.gmail.com>
<57186618-F010-42E6-A757-B617C4001B5B@gmail.com>
Mime-Version: 1.0 (1.0)
In-Reply-To: <57186618-F010-42E6-A757-B617C4001B5B@gmail.com>
Content-Type: text/plain;
charset=utf-8
Content-Transfer-Encoding: quoted-printable
Message-Id: <F4C9E954-6A29-4A31-B09B-7F0B62270EF8@voskuil.org>
X-Mailer: iPhone Mail (12B440)
From: Eric Voskuil <eric@voskuil.org>
Date: Mon, 2 Feb 2015 11:45:49 -0700
To: Brian Erdelyi <brian.erdelyi@gmail.com>
X-Spam-Score: 0.0 (/)
X-Spam-Report: Spam Filtering performed by mx.sourceforge.net.
See http://spamassassin.org/tag/ for more details.
X-Headers-End: 1YIM0m-0006nW-1P
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Proposal to address Bitcoin malware
X-BeenThere: bitcoin-development@lists.sourceforge.net
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: <bitcoin-development.lists.sourceforge.net>
List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>,
<mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe>
List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development>
List-Post: <mailto:bitcoin-development@lists.sourceforge.net>
List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help>
List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>,
<mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe>
X-List-Received-Date: Mon, 02 Feb 2015 18:46:17 -0000
Confusing or not, the reliance on multiple signatures as offering greater se=
curity than single relies on the independence of multiple secrets. If the se=
crets cannot be shown to retain independence in the envisioned threat scenar=
io (e.g. a user's compromised operating system) then the benefit reduces to m=
aking the exploit more difficult to write, which, once written, reduces to n=
o benefit. Yet the user still suffers the reduced utility arising from great=
er complexity, while being led to believe in a false promise.
> On Feb 2, 2015, at 11:35 AM, Brian Erdelyi <brian.erdelyi@gmail.com> wrote=
:
>=20
>=20
>> Bitcoin Authenticator is a desktop app+mobile app pair. It pairs with you=
r phone over wifi, cloud push, maybe Bluetooth as well. I forget exactly.=20=
>>=20
>> It's done in the same way as Lighthouse, so it runs Win/Mac/Linux on desk=
top and Android on mobile.
>>=20
>> It could be adapted to use BitGo as a third party key holder with SMS aut=
henticator relatively easily, I think. We did the bulk of all the needed wor=
k last year as part of the bitcoinj multisig work. Then you'd have a server i=
nvolved, but not a web app.
>=20
> I really like the concept of Bitcoin Authenticator and think it=E2=80=99s e=
xactly what I was describing (without a third-party).
>=20
> I think it=E2=80=99s a bit confusing when they describe Bitcoin Authentica=
tor as 2FA. I think it may be more accurate to describe it as out of band t=
ransaction verification/signing or dual transaction signing. Regardless, it=
=E2=80=99s very exciting to see others are thinking about this too.
>=20
> Brian Erdelyi
> --------------------------------------------------------------------------=
----
> Dive into the World of Parallel Programming. The Go Parallel Website,
> sponsored by Intel and developed in partnership with Slashdot Media, is yo=
ur
> hub for all things parallel software development, from weekly thought
> leadership blogs to news, videos, case studies, tutorials and more. Take a=
> look and join the conversation now. http://goparallel.sourceforge.net/
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
|
