[Webkit-unassigned] [Bug 135186] New: Attempt to reduce uniqueness of canvas fingerprinting

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=135186

           Summary: Attempt to reduce uniqueness of canvas fingerprinting
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
               URL: http://www.browserleaks.com/canvas
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Canvas
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rodger.combs at gmail.com


A browser's canvas implementation, text antialiasing, image compression, and several other features can be used to gain additional bits of information to identify a browser user across sites. Some of these factors can likely be avoided to help reduce the uniqueness of these "fingerprints".
There are a few questions that should be discussed:
1. What relevant factors exist?
2. Which can be eliminated?
3. Would eliminating these factors introduce performance or quality regressions, or other new issues?
4. Could these regressions be worth it for the additional privacy?
Discuss.

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