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
|
Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191]
helo=mx.sourceforge.net)
by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76)
(envelope-from <gmaxwell@gmail.com>) id 1TRkik-00058G-Gf
for bitcoin-development@lists.sourceforge.net;
Fri, 26 Oct 2012 14:17:10 +0000
Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com
designates 209.85.223.175 as permitted sender)
client-ip=209.85.223.175; envelope-from=gmaxwell@gmail.com;
helo=mail-ie0-f175.google.com;
Received: from mail-ie0-f175.google.com ([209.85.223.175])
by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128)
(Exim 4.76) id 1TRkij-0006hj-Qd
for bitcoin-development@lists.sourceforge.net;
Fri, 26 Oct 2012 14:17:10 +0000
Received: by mail-ie0-f175.google.com with SMTP id c13so4112762ieb.34
for <bitcoin-development@lists.sourceforge.net>;
Fri, 26 Oct 2012 07:17:04 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.43.7.132 with SMTP id oo4mr19655066icb.6.1351261024572; Fri,
26 Oct 2012 07:17:04 -0700 (PDT)
Received: by 10.64.171.73 with HTTP; Fri, 26 Oct 2012 07:17:04 -0700 (PDT)
In-Reply-To: <CANEZrP2sBZL=UYAxtjU2Su13Z12wB7s04LxmcyUR2hH51tcN9g@mail.gmail.com>
References: <CANEZrP0XALwBFJyZTzYd5xBp4MRrjv0s_y2tOXbO7UgjWF2HzA@mail.gmail.com>
<CAAS2fgScydOWz_eqnhWxQNVUOtzvSBwkj7tttP3_DLdW+=3CTQ@mail.gmail.com>
<CANEZrP2sBZL=UYAxtjU2Su13Z12wB7s04LxmcyUR2hH51tcN9g@mail.gmail.com>
Date: Fri, 26 Oct 2012 10:17:04 -0400
Message-ID: <CAAS2fgSPk8QgYq2zcV+G2GoQyo5AfnRj4=+sURr34KZakhqazQ@mail.gmail.com>
From: Gregory Maxwell <gmaxwell@gmail.com>
To: Mike Hearn <mike@plan99.net>
Content-Type: text/plain; charset=UTF-8
X-Spam-Score: -1.4 (-)
X-Spam-Report: Spam Filtering performed by mx.sourceforge.net.
See http://spamassassin.org/tag/ for more details.
-1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for
sender-domain
0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider
(gmaxwell[at]gmail.com)
-0.0 SPF_PASS SPF: sender matches SPF record
-0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from
author's domain
0.1 DKIM_SIGNED Message has a DKIM or DK signature,
not necessarily valid
-0.1 DKIM_VALID Message has at least one valid DKIM or DK signature
0.2 AWL AWL: From: address is in the auto white-list
X-Headers-End: 1TRkij-0006hj-Qd
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Draft BIP for Bloom filtering
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: Fri, 26 Oct 2012 14:17:10 -0000
On Fri, Oct 26, 2012 at 10:01 AM, Mike Hearn <mike@plan99.net> wrote:
> If you just want to waste bandwidth of nodes you can connect to nodes
> and repeatedly download blocks, or fill the network with fake nodes
> that spam random generated transactions to whoever connects. I don't
> see how to avoid that so it seems odd to worry about a much more
> complicated attack.
Because I can potentially waste bandwidth of all nodes forever (well as long
as users are still scanning blocks with my transactions in them) with O(1) work.
Though I'm not sure how much of a threat is vs just paying 1e-8 btc to lots of
addresses which would only be less bad by some constant factor as worse.
I guess I should try to attack it and see how bad the pollution I can construct
should be. (offline, of course)
|
