[tor-bugs] #30862 [Applications/Tor Browser]: 10ms time precision via EXSLT date-time function

Tor Bug Tracker & Wiki blackhole at torproject.org
Tue Sep 3 06:35:03 UTC 2019


#30862: 10ms time precision via EXSLT date-time function
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 Reporter:  gk                               |          Owner:  tbb-team
     Type:  defect                           |         Status:  new
 Priority:  High                             |      Milestone:
Component:  Applications/Tor Browser         |        Version:
 Severity:  Normal                           |     Resolution:
 Keywords:  tbb-fingerprinting-time-highres  |  Actual Points:
Parent ID:                                   |         Points:
 Reviewer:                                   |        Sponsor:
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Comment (by gk):

 Replying to [comment:5 Thorin]:
 > Am I missing something here? I can already get 1ms timing via other
 means: see Fantastic Timers and Where to Find Them (gk: I sent you a copy
 a month ago)

 Yes, there are ways to get around fingerprinting defenses. But that is not
 a reason to not implement defenses in the first place. You close hole by
 hole raising the bar for the attacker. Remeber: you don't win the
 fingerprinting game by closing _all_ the holes but by making it hard
 enough that trackers lose interest in this technique and/or don't get
 usable results out of it anymore.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30862#comment:6>
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