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

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#13400: Canvas Fingerprinting: fonts
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 Reporter:  cypherpunks                          |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-testcase, tbb-fingerprinting-    |  Actual Points:
  fonts                                          |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Description changed by arthuredelstein:

Old description:

> As I know, TBB blocks ctx.getImageData. But I think it is not enough.
> Look at this.
> https://gist.github.com/KOLANICH/00b9145743d841cff4d7
> I tried this, the fingerprint survives restart of TBB.
> I don't know, wheither this fingerprint can be used to identify user's OS
> (at least it can be used to identify fonts) and hardware, but it is
> differen than the one generated with the browser in the OS.

New description:

 As I know, TBB blocks ctx.getImageData. But I think it is not enough.
 Look at this.
 https://web.archive.org/web/20141016035848/https://gist.github.com/KOLANICH/00b9145743d841cff4d7
 I tried this, the fingerprint survives restart of TBB.
 I don't know, wheither this fingerprint can be used to identify user's OS
 (at least it can be used to identify fonts) and hardware, but it is
 differen than the one generated with the browser in the OS.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13400#comment:19>
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