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update privacy readme for opSupportLimits #808

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Jan 26, 2025
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4 changes: 3 additions & 1 deletion security-privacy.md
Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,9 @@ No.

> - 2.6 What information from the underlying platform, e.g. configuration data, is exposed by this specification to an origin?

No information from the underlying platform is exposed directly. An execution time analysis may reveal indirectly the performance of the underlying platform's neural network hardware acceleration capabilities relative to another underlying platform.
The [opSupportLimits()](https://www.w3.org/TR/webnn/#api-mlcontext-opsupportlimits) method intentionally exposes per-operator behavior that is expected to vary depending on the underlying platform, such as the supported data types or preferred data layout for each operator. The information exposed roughly corresponds to the underlying operating system and/or browser version, and so it shouldn't introduce additional entropy.

Additionally, an analysis of execution time may indirectly reveal the performance of the underlying platform's neural network hardware acceleration capabilities relative to another underlying platform.

> - 2.7 Does this specification allow an origin access to sensors on a user’s device

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