[tor-bugs] [Tor Bug Tracker] #1382: Resize to a multiple of 50px can't be turned off and seems to make browser fingerprinting possible

["Tor Bug Tracker" <torproject-admin@xxxxxxxxxxxxxx>]

#1382: Resize to a multiple of 50px can't be turned off and seems to make browser
fingerprinting possible
------------------------------+---------------------------------------------
 Reporter:  anonymous         |        Type:  defect                            
   Status:  new               |    Priority:  major                             
Milestone:  Torbutton: 1.2.5  |   Component:  Tor-Torbutton                     
  Version:  Torbutton: 1.2.5  |    Keywords:  50px resize browser fingerprinting
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 http://panopticlick.eff.org/ gives a quick overview over information that
 can be used to identify your browser pretty easy if some of your settings
 are quite unique. Unfortunately, the only thing that makes my browser
 unique seems to be the window size.
 With tor deactivated it says "one of 27" browsers has the resolution
 1920x1200x24, which is my native resolution, with tor it says that the
 resolution 1900x1000x24 is unique. When I turn off the resizing feature in
 the settings, I still have this weird resolution that seems to do what
 it's supposed to avoid, namely weaken anonymity.

 I don't know if the fact that the resolution 1900x1000x24 shall be unique
 is a flaw of the Panopticlick calculations, but at least it seems to be a
 bug that I can't disable the resizing although turning it off in the
 options. And I don't get the sense of rounding a native screen resolution.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/1382>
Tor Bug Tracker <https://trac.torproject.org/>
The Tor Project: anonymity online