tree 058a19404b7e37051abb2b6188ef16210bf8a90d
parent 8ecb8a727ddcfc2f5d0c2a996186a19654cae6f6
author Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com> 1571045933 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1571046925 -0400

[sensors] Round off Ambient Light Sensor readouts to the nearest 50 Lux.

There have been some concerns regarding the precision of readouts from the
Ambient Light Sensor. To decrease the entropy, we are rounding off the
illuminance value to the nearest 50 Lux to mitigate the known attack
vectors as summarized in [1].

[1] https://github.com/w3c/ambient-light/issues/13#issuecomment-302393458

This CL is based on
https://chromium-review.googlesource.com/c/chromium/src/+/1695412 by
Rijubrata Bhaumik and myself.

Bug: 642731, 606766
Change-Id: I85449bdb835e8486b080fc269938b6c96f000c2a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1834346
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>
Cr-Commit-Position: refs/heads/master@{#705486}