Intent to Ship: Private Aggregation API: aggregation coordinator selection
Alex Turner
Contact emails
Explainer
https://github.com/patcg-individual-drafts/private-aggregation-api#aggregation-coordinator-choice
Specification
https://github.com/patcg-individual-drafts/private-aggregation-api/pull/106
Summary
Modification to the Private Aggregation API to provide a mechanism for selecting which coordinator to use for payload encryption (from a vendor-specified allowlist). The choice of service is made with an additional option in Shared Storage’s run() and selectURL() calls, and in Protected Audience’s runAdAuction() and joinAdInterestGroup() calls. The broad approach largely aligns with Attribution Reporting’s approach (see https://chromestatus.com/feature/5197591256236032).
Blink component
TAG review
https://github.com/w3ctag/design-reviews/issues/846 (We have not requested a signal for these changes specifically.)
TAG review status
Pending
Risks
Interoperability and Compatibility
This feature is optional and backwards compatible.
Gecko: No signal (https://github.com/mozilla/standards-positions/issues/805) We have not requested a signal for these changes specifically. The Gecko position on Shared Storage (one of the ways Private Aggregation is exposed) is negative.
WebKit: No signal (https://github.com/WebKit/standards-positions/issues/189) We have not requested a signal for these changes specifically.
Web developers: No signals
Other signals:
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?
None
Debuggability
No new debug capabilities beyond the existing internals page (chrome://private-aggregation-internals) and temporary debug mode.
Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?
All but Webview
Is this feature fully tested by web-platform-tests?
WPTs will be added when the feature is enabled.
Flag name on chrome://flags
None
Finch feature name
PrivateAggregationApiMultipleCloudProviders
Requires code in //chrome?
False
Tracking bug
Launch bug
https://launch.corp.google.com/launch/4272421
Estimated milestones
We intend to ship in M120.
Anticipated spec changes
None
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5140711678935040
Links to previous Intent discussions
Original I2S, Follow-up enhancements I2S
This intent message was generated by Chrome Platform Status.
Chris Harrelson
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Mike Taylor
LGTM2
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Yoav Weiss
LGTM1
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Alex Turner
LGTM3
LGTM1
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