[pointerevents] Ensure predicted events only use input from the current partition (#518)

jyasskin has just created a new issue for https://github.com/w3c/pointerevents:

== Ensure predicted events only use input from the current partition ==
From https://www.w3.org/TR/2024/WD-pointerevents3-20240318/#predicted-events:
> Some user agents have built-in algorithms which, after a series of confirmed pointer movements, can make a prediction (based on past points, and the speed/trajectory of the movement) what the position of future pointer movements may be.

If the prediction is based on the user's behavior on other sites, or on the same site across storage clearing, it could let sites join identities they shouldn't be able to join. Would it be possible to restrict the possible source data for generating predictions to the current [partition](https://w3ctag.github.io/privacy-principles/#dfn-partition)?

Please view or discuss this issue at https://github.com/w3c/pointerevents/issues/518 using your GitHub account


-- 
Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config

Received on Thursday, 5 September 2024 18:21:49 UTC