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Re: [tor-talk] What is preventing Bridge Enumeration?

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Subject: Re: [tor-talk] What is preventing Bridge Enumeration?
From: Philipp Winter <phw@xxxxxxxxx>
Date: Wed, 15 Feb 2017 12:10:05 -0500
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On Wed, Feb 15, 2017 at 02:32:32PM +0100, BVpTuvb AVMV wrote:
> What is preventing an attacker to start up a few mid-nodes and
> enumerating all IPs and substracting those from the list of publicly
> known entry-nodes to get a list of (all) unlisted bridges?

That is indeed a problem.  Section III.D of the following paper talks
about the issue in greater detail:
<https://censorbib.nymity.ch/pdf/Ling2012a.pdf>
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References:
- [tor-talk] What is preventing Bridge Enumeration?
  - From: BVpTuvb AVMV

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