[tor-bugs] #16672 [Applications/Tor Browser]: Text rendering allows font fingerprinting

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Nov 29 19:25:46 UTC 2017

#16672: Text rendering allows font fingerprinting
 Reporter:  arthuredelstein                      |          Owner:
                                                 |  arthuredelstein
     Type:  defect                               |         Status:
                                                 |  assigned
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-fingerprinting-fonts, tbb-5.5,   |  Actual Points:
  TorBrowserTeam201603                           |
Parent ID:  #18097                               |         Points:
 Reviewer:                                       |        Sponsor:

Comment (by cypherpunks):

 The situation with the current TBB (7.0.10) looks improved, the
 ~dcf/fonttest.html has the same fingerprint for me. However, per:

 in the "JS Fonts (classic)" test, the fallback metrics/fonts are different
 between different test systems.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16672#comment:46>
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