[tor-bugs] #10969 [Core Tor/Tor]: Set of guard nodes can act as a linkability fingerprint

Tor Bug Tracker & Wiki blackhole at torproject.org
Sun Sep 17 16:14:04 UTC 2017

#10969: Set of guard nodes can act as a linkability fingerprint
 Reporter:  asn                                  |          Owner:
                                                 |  mikeperry
     Type:  defect                               |         Status:
                                                 |  reopened
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-client, tor-guard, XKEYSCORE,    |  Actual Points:
  prop259, SponsorU-deferred, QUICKANT           |
Parent ID:                                       |         Points:  large
 Reviewer:                                       |        Sponsor:

Comment (by cypherpunks):

 Replying to [comment:39 isis]:
 > Replying to [comment:36 cypherpunks]:
 > >
 > > Btw, did anything actually change between asn commenting "switching to
 one entry guard slightly improved the situation, but did not fix the
 issue. The new guard design did not fix the issue either." and nickm
 closing the issue with "Prop271 and its predecessors have made progress
 > Yeah, there were several iterations of the new guard algorithm.
 [https://github.com/isislovecruft/guardsim Nick and I simulated several of
 the designs]

 BTW, those simulations actually occurred a year //before// asn's astute
 comment, not after it.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10969#comment:47>
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