[metrics-bugs] #6473 [Metrics/Analysis]: bandwidth related anonymity set reduction

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Apr 2 09:10:42 UTC 2018


#6473: bandwidth related anonymity set reduction
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 Reporter:  proper            |          Owner:  arma
     Type:  defect            |         Status:  assigned
 Priority:  Medium            |      Milestone:
Component:  Metrics/Analysis  |        Version:
 Severity:  Normal            |     Resolution:
 Keywords:  nickm-cares       |  Actual Points:
Parent ID:                    |         Points:
 Reviewer:                    |        Sponsor:
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Comment (by arma):

 Answer 1: I still like my suggestion from
 https://blog.torproject.org/trip-report-tor-trainings-dutch-and-belgian-
 police
 about how to set up an onion service for this sort of situation:
 "If I wanted to run a hidden service website that had a nation-state
 adversary, I would a) run a good solid webserver like nginx; b) run it in
 a VM, in a way that the VM couldn't learn its location — "no looking up
 its IP", but also more subtle things like "no looking up nameservers", "no
 looking up reachable wireless access points", etc; and then c) put that VM
 in a VPS running in a country that hates my adversary. That way even if
 somebody breaks into the webserver and breaks out of the VM, they're still
 faced with a frustratingly long bureaucratic step."

 In particular, if you are living in country X or your site is about
 country X, consider not running your onion service is country X.

 Answer 2: for papers related to your attack, check out these two:
 https://www.freehaven.net/anonbib/#esorics10-bandwidth
 https://www.freehaven.net/anonbib/#ccs2011-stealthy

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6473#comment:5>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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