[tbb-bugs] #18097 [Applications/Tor Browser]: Font fingerprinting defenses roadmap (parent ticket)

Tor Bug Tracker & Wiki blackhole at torproject.org
Fri Dec 1 00:27:39 UTC 2017

#18097: Font fingerprinting defenses roadmap (parent ticket)
 Reporter:  arthuredelstein           |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tbb-fingerprinting-fonts  |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:

Comment (by amit):

 Very cool work on font fingerprinting defenses. I have a question with
 regards to the following statement:

 > It does not prevent an attacker from identifying the operating system,
 nor from distinguishing two versions of an operating system by detecting
 different variants of the same font.

 Does this mean that the forcing the platform to `Win32` the cpu-class to
 `Windows NT 6.1`, and the user-agent to have `Windows NT 6.1` does not
 help increase the size of the anonymity set (mentioned in #9501), since
 the fonts allow distinguishing between Windows, MacOS, and Linux in any

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18097#comment:9>
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