[tor-bugs] #16110 [Applications/Tor Browser]: Improve Time Resolution Defense

Fri Oct 28 14:24:13 UTC 2016

#16110: Improve Time Resolution Defense
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 Reporter:  mikeperry                        |          Owner:  mikeperry
     Type:  defect                           |         Status:
                                             |  needs_review
 Priority:  Medium                           |      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 bugzilla):

 Replying to [comment:6 gk]:
 > Replying to [ticket:16110 mikeperry]:
 > > Firefox 38 also added a bunch more time sources to window.Performance,
 and also added Performance API support to WebWorkers and SharedWorkers.
 >
 > See #16340 which is/was for this investigation in particular.
 API was added specially to gain sub-ms resolution, and you set it to 100
 ms, thus made fully useless.
 Authors tried to cope with some issues: https://www.w3.org/TR/hr-time
 /#privacy-security.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16110#comment:21>
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