From: Peter Todd <pete@petertodd•org>
To: Christophe Biocca <christophe.biocca@gmail•com>,
bitcoin-dev@lists•linuxfoundation.org
Subject: Re: [bitcoin-dev] Bitcoin XTs Tor IP blacklist downloading system has significant privacy leaks.
Date: Tue, 18 Aug 2015 19:25:29 -0700 [thread overview]
Message-ID: <20150819022528.GA8920@muck> (raw)
In-Reply-To: <20150819013645.GC2835@muck>
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On Tue, Aug 18, 2015 at 06:36:45PM -0700, Peter Todd via bitcoin-dev wrote:
> is false. However, in the common scenario of a firewalled node, where
> the operator has neglected to explicitly set -listen=0, the code does
> still download the Tor exit node list, revealing the true location of
> the node. This is contrary to the previous behavior of not revealing any
> IP information in that configuration.
>
> FWIW Gregory Maxwell removed the last "call home" feature in pull-req
> #5161, by replacing the previous calls to getmyip.com-type services with
> a local peer request. Similarly the DNS seeds use the DNS protocol
> specifically to avoid leaking IP address information.
>
> tl;dr: Yes, Bitcoin XT has a privacy problem with the automatic Tor exit
> node list download.
Oh, and I just checked, and Mike's original pull-req for the Tor
blacklist didn't include the proxy disable code; what's in master != the
pull-req, so the OP may have been looking at the wrong code by accident.
(I personally noticed this issue in the pull-req and didn't realise it
hadn't been merged into master w/o modifications)
https://github.com/mikehearn/bitcoinxt/commit/931a4d59a03c7e64d7d85ddfc07ae127533c7f28#diff-11780fa178b655146cb414161c635219R171
Kinda sloppy of Mike to be making changes in master that don't
correspond to the peer-reviewed pull-req code...
--
'peter'[:-1]@petertodd.org
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next prev parent reply other threads:[~2015-08-19 2:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-19 1:08 Christophe Biocca
2015-08-19 1:36 ` Peter Todd
2015-08-19 1:48 ` Gregory Maxwell
2015-08-19 2:25 ` Peter Todd [this message]
2015-08-19 15:45 ` Mike Hearn
2015-08-19 18:51 ` Btc Drak
-- strict thread matches above, loose matches on Subject: below --
2015-08-18 23:31 F L
2015-08-18 23:56 ` Andrew LeCody
2015-08-19 0:00 ` Patrick Strateman
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