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Re: [tor-bugs] #16678 [Applications/Tor Browser]: Enhance KeyboardEvent fingerprinting protection for unusual characters
#16678: Enhance KeyboardEvent fingerprinting protection for unusual characters
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Reporter: arthuredelstein | Owner: sysrqb
Type: enhancement | Status:
| needs_revision
Priority: Medium | Milestone:
Component: Applications/Tor Browser | Version:
Severity: Normal | Resolution:
Keywords: tbb-fingerprinting, | Actual Points:
TorBrowserTeam201711 |
Parent ID: | Points:
Reviewer: | Sponsor:
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Comment (by gk):
Replying to [comment:14 sysrqb]:
> Replying to [comment:13 arthuredelstein]:
[snip]
> > Could you also comment here for the record on AltGr vs Alt vs AltLeft?
Is AltGr they expected modifier in KeyboardEvents from most modern
keyboards? It doesn't seem to appear on my Mac, if I recall correctly.
>
> Complicated. On Windows, it seems AltGr (AltRight) is converted into two
distinct keydown KeyboardEvents, one for key='Alt' and keyCode='AltRight'
and a second event with key='Control' and keyCode='CtrlLeft', while in
Gnome I see key='AltGraph' and keyCode='AltRight'. The Wikipedia page
[WIKIALTGR] says the Option key on a Mac keyboard is similar, but I don't
have a Mac availbale for testing so unfortunately I don't know how that
translates into KeyEvents in the browser when using different keyboard
layouts.
>
> [WIKIALTGR] https://en.wikipedia.org/wiki/AltGr_key
FWIW: https://bugzilla.mozilla.org/show_bug.cgi?id=900750 (which landed in
Firefox 63) might change things on Windows. We should revisit that when
working on this bug again.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16678#comment:25>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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