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Re: [sensors] access to orientation without access to linear acceleration? (#399)

From: Reilly Grant via GitHub <sysbot+gh@w3.org>
Date: Tue, 19 Nov 2019 21:36:53 +0000
To: public-device-apis-log@w3.org
Message-ID: <issue_comment.created-555726838-1574199412-sysbot+gh@w3.org>
I think I agree with @fergald's original point. If we make the assumption that it is difficult to reverse engineer the low-level sensor values from a high-level sensor values then the current permission and feature policy design doesn't make sense. A model which gives both users and developers the ability to make meaningful choices about the data being exposed should provide a strict ordering based on the sensitivity of the data. For example, the set of `raw-accelerometer` and `raw-gyroscope` permissions may imply the `relative-orientation` permission but not the other way around.

On the other hand I believe the point that @snyderp is making is that even the high-level sensor data is sufficient for fingerprinting, which renders the idea of this graduated permission model moot. In that case I believe, as discussed on w3c/deviceorientation#85, that the best solution is to find a mitigation through precision reduction or noise injection which removes fingerprintable behavior while not significantly changing the behavior of the sensor.

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Received on Tuesday, 19 November 2019 21:36:55 UTC

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