summaryrefslogtreecommitdiff
path: root/62/feec0d4810778cfebce297a4602a1cb29b2e59
blob: b6bae5e825e1d86a0fcfe51fd2982ce6f253fcaf (plain)
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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
Return-Path: <tomh@thinlink.com>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
	[172.17.192.35])
	by mail.linuxfoundation.org (Postfix) with ESMTPS id B2E9A94B
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Mon, 19 Sep 2016 19:54:02 +0000 (UTC)
X-Greylist: whitelisted by SQLgrey-1.7.6
Received: from mail-pa0-f47.google.com (mail-pa0-f47.google.com
	[209.85.220.47])
	by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 661DE126
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Mon, 19 Sep 2016 19:54:02 +0000 (UTC)
Received: by mail-pa0-f47.google.com with SMTP id wk8so51672951pab.1
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Mon, 19 Sep 2016 12:54:02 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=thinlink-com.20150623.gappssmtp.com; s=20150623;
	h=subject:to:references:from:message-id:date:user-agent:mime-version
	:in-reply-to; bh=pTACif6rnP4IcHgW4XnEXQetSWtYzz4oKxVpB20HDaw=;
	b=MOggpNgmUtojhs2kII2pQokVGr8uy0TBHxpIMhpPIEllImawipmpZzkkK3XlndPsQV
	52OhdDt33oYk4HK62iR71l+VSz6kDOc63s33tFioF1DT/LxsCfy6/3lbhaiBt0gT+3oh
	/SASzOrqEDH6UU5tNsbJaMHtp9+vaWra+0tXbJu+eCH5TS2VA+re9pEAoTZShh5ncx/8
	WwoAjMjHJMl+sPQHhxZII5AgOtkjNuvPFYNTZc3lEaCHnggYuMz1z1l49Yd2G1plJraE
	NXxAngLZmmEvn7P92ZBQFu2g/47GDUqz5LjOhHM33vwBZhEz/tVV5SM5PvHTPWRnem6S
	+LSw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=1e100.net; s=20130820;
	h=x-gm-message-state:subject:to:references:from:message-id:date
	:user-agent:mime-version:in-reply-to;
	bh=pTACif6rnP4IcHgW4XnEXQetSWtYzz4oKxVpB20HDaw=;
	b=T7AyD67YrzSmytJaDILYN+gzNMGUP5jslxPymDInTh06dqGcwVPx7RN9YpuBNq3Qdr
	q09VZ2JCdew9QKLLppSPe9evRjy7lQC095HviKDF675n70OiMII+xX8nxB3XEFqIEU2b
	Qic8zedTG1fmrtW6uH3xP2a93ns5AYOrukQVrResK63EbBVcNQ0tJ38pDIcKblEn5I4F
	qthgmmdP7svgQ7NBUrsxDl8+vGbbeT/b0shVDrMqqcrcXc0Z2GEob9lO3lPkBGvzZBj9
	hNaR4fqe40wD0ngBQE9llpk7EdZxQlROhhqyGTRLYk4srUwe4U9lBmVG0r3nhrmq+rWq
	+Dsg==
X-Gm-Message-State: AE9vXwOPIxVcWQlG/vieChZ8NFfDluMbyHw6OrxHJbwBCZ5YAP2U6nMAk7z3dC+WLUHju883
X-Received: by 10.66.22.70 with SMTP id b6mr27689862paf.94.1474314841943;
	Mon, 19 Sep 2016 12:54:01 -0700 (PDT)
Received: from [192.168.1.89] (99-8-65-117.lightspeed.davlca.sbcglobal.net.
	[99.8.65.117]) by smtp.googlemail.com with ESMTPSA id
	d5sm73487018pfc.4.2016.09.19.12.54.00
	(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
	Mon, 19 Sep 2016 12:54:00 -0700 (PDT)
To: Peter Todd <pete@petertodd.org>,
	Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
References: <20160918042001.GA9076@fedora-21-dvm>
	<7ff1a87d-2916-2024-ea05-d6413bd17767@thinlink.com>
	<20160919175615.GA6360@fedora-21-dvm>
From: Tom Harding <tomh@thinlink.com>
Message-ID: <b70ab80f-2a9a-2d6e-00c7-6d281e514778@thinlink.com>
Date: Mon, 19 Sep 2016 12:53:46 -0700
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101
	Thunderbird/45.2.0
MIME-Version: 1.0
In-Reply-To: <20160919175615.GA6360@fedora-21-dvm>
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature";
	boundary="r1vWbCUGCPMtc330R6GrGKSBDsnTeQFis"
X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED,
	DKIM_VALID,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: Mon, 19 Sep 2016 19:55:02 +0000
Subject: Re: [bitcoin-dev] Interpreting nTime for the purpose of
 Bitcoin-attested timestamps
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: Mon, 19 Sep 2016 19:54:02 -0000

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--r1vWbCUGCPMtc330R6GrGKSBDsnTeQFis
Content-Type: multipart/mixed; boundary="C3pXLBJAhLNWJ36uRrcPUCkGamm1LxFtN";
 protected-headers="v1"
From: Tom Harding <tomh@thinlink.com>
To: Peter Todd <pete@petertodd.org>,
 Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Message-ID: <b70ab80f-2a9a-2d6e-00c7-6d281e514778@thinlink.com>
Subject: Re: [bitcoin-dev] Interpreting nTime for the purpose of
 Bitcoin-attested timestamps
References: <20160918042001.GA9076@fedora-21-dvm>
 <7ff1a87d-2916-2024-ea05-d6413bd17767@thinlink.com>
 <20160919175615.GA6360@fedora-21-dvm>
In-Reply-To: <20160919175615.GA6360@fedora-21-dvm>

--C3pXLBJAhLNWJ36uRrcPUCkGamm1LxFtN
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: quoted-printable

On 9/19/2016 10:56 AM, Peter Todd wrote:
> I should state that assumption more clearly.

Glad to get you thinking, and I need to change my suggestion.  The
catch-up formula is not applicable because it doesn't limit how long the
dishonest miners have to catch up.

Instead you want the probability that the honest miners can build a
chain N blocks long before the dishonest miners do the same, which is

CDF[Erlang(N, q) - Erlang(N, 1 - q), 0]

I have some apparatus for doing this numerically without simulation if
you're interested.



--C3pXLBJAhLNWJ36uRrcPUCkGamm1LxFtN--

--r1vWbCUGCPMtc330R6GrGKSBDsnTeQFis
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=+l2n
-----END PGP SIGNATURE-----

--r1vWbCUGCPMtc330R6GrGKSBDsnTeQFis--