[tor-bugs] #11949 [Firefox Patch Issues]: Randomize Tor Browser Fingerprint (was: Randomize Browser Fingerprint..)

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed May 14 07:01:12 UTC 2014


#11949: Randomize Tor Browser Fingerprint
--------------------------------------+-----------------------
     Reporter:  mt2014                |      Owner:  mikeperry
         Type:  enhancement           |     Status:  new
     Priority:  normal                |  Milestone:
    Component:  Firefox Patch Issues  |    Version:
   Resolution:                        |   Keywords:
Actual Points:                        |  Parent ID:
       Points:                        |
--------------------------------------+-----------------------
Changes (by gk):

 * priority:  blocker => normal
 * component:  Torbutton => Firefox Patch Issues


Comment:

 Replying to [ticket:11949 mt2014]:
 > TorBrowser still can be easily fingerprinted:
 >
 > 1. check your fingerprint ID here & copy it to notepad:
 > http://fingerprint.pet-portal.eu/
 > http://www.browserleaks.com/canvas
 >
 > 2. Do whatever you can to delete your trace (dom storage, html5 storage,
 cookie, flash cookie, reinstall browser)
 >
 > 3. check your fingerprint once more from above sites. 99% it will still
 be same!

 That's exactly the idea and not a bug: if we make it possible that all Tor
 Browser users look the same we have defeated the fingerprinting as no
 particular Tor Browser user may be singled out due to some deviation from
 the Tor Browser "norm". See again the current design documentation
 https://www.torproject.org/projects/torbrowser/design/#fingerprinting-
 linkability .

 That said, there is research going on whether we can't defeat
 fingerprinting by randomizing properties as you suggest. So far, I am not
 convinced by the approaches and analysis yet.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11949#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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