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Canvas fingerprinting mitigations #38

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uazo opened this issue Feb 9, 2023 · 3 comments
Open

Canvas fingerprinting mitigations #38

uazo opened this issue Feb 9, 2023 · 3 comments
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partially done privacy wip work in progress

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@uazo
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uazo commented Feb 9, 2023 •
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Move all document::GetNoiseFactorX() to ExecutionContext
check

  • OffscreenCanvasRenderingContext2D::measureText()
  • OffscreenCanvas::OriginClean()
  • WorkerSettings
@uazo
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uazo commented Feb 16, 2023

currently introduced random factor for OffscreenCanvasRenderingContext2D in Multiple fingerprinting mitigations patch

I modified the calc of the general factor, because there is a bug and it is too small and too often equal to 1, rendering the patch useless.

theoretically, it would be appropriate to move the value from the Page to the ExecutionContext (or to a volatile content setting), so that it can also be used in workers with the same value as the initial page.
however, at the moment, it is useless as it seems that communication (with PostMessage) is also possible between first parties on different browsercontexts (to be verified): in that case, as they are different pages, they would have different factors (and should not)

@uazo uazo added the privacy label Mar 15, 2023
@uazo uazo changed the title Fix Multiple fingerprinting mitigations patch Canvas fingerprinting mitigations Mar 15, 2023
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uazo commented Apr 4, 2023

bug in #116

@uazo uazo added the wip work in progress label May 20, 2023
@uazo uazo mentioned this issue Jun 21, 2023
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uazo commented Jul 17, 2023

check https://bugs.chromium.org/p/chromium/issues/detail?id=1445564

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