[tbb-bugs] #13400 [Tor Browser]: Canvas Fingerprinting: fonts

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Oct 21 00:23:26 UTC 2015

#13400: Canvas Fingerprinting: fonts
 Reporter:  cypherpunks   |          Owner:  tbb-team
     Type:  defect        |         Status:  needs_information
 Priority:  High          |      Milestone:
Component:  Tor Browser   |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:  tbb-testcase  |  Actual Points:
Parent ID:                |         Points:
  Sponsor:                |
Changes (by arthuredelstein):

 * severity:   => Normal


 It's possible that measureText can detect differences between different
 rendering engines, rendering the same text with the same font, even if
 fonts are bundled/whitelisted. So I think it might still be beneficial to
 round the result of measureText.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13400#comment:13>
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