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

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:
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