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Explainer Attribution Reporting API with Aggregatable Reports <https://github.com/WICG/attribution-reporting-api/blob/main/AGGREGATE.md> Aggregation Service for the Attribution Reporting API <https://github.com/WICG/attribution-reporting-api/blob/main/AGGREGATION_SERVICE_TEE.md> Specification https://wicg.github.io/attribution-reporting-api/ Blink component Internals > AttributionReporting <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3EAttributionReporting> TAG review Original I2S for the Attribution Reporting API - Closed <https://github.com/w3ctag/design-reviews/issues/724> TAG review status Declined <https://github.com/w3ctag/design-reviews/issues/724#issuecomment-2234828340> Summary We are landing the following change to the Attribution Reporting API focused on: - Removing aggregatable report limit when trigger context ID is non-null This change is based on API caller feedback and the need for being able to measure a higher number of conversion events for certain user flows. Currently the API has a limit that allows up to 20 aggregatable reports to be generated per source registration which is restrictive for use cases where a user may have a longer user journey. This change removes the aggregatable report limit when a trigger context ID is provided as part of the registration. The removal of this limit is restricted to only when the trigger context ID is specified, because when it is specified the API applies a higher rate of null reports which helps to protect against cross-site information leaking through report counts. Additionally, aggregatable reports will still be bound by other limits that restrict the total amount of information that can be measured, such as the L1 contribution budget (65,536) per source and the attribution rate limit. Explainer/Spec changes 1. Explainer & Spec: https://github.com/WICG/attribution-reporting-api/pull/1475 Risks Interoperability and Compatibility This change is not a fully backwards compatible change. There’s no API surface change, but it can cause the API to behave differently given the same set of inputs. The API caller may receive more aggregatable reports if they use the trigger context ID feature, whereas previously if they tried to generate more than 20 aggregatable reports for a given source registration, then any reports beyond 20 would be rejected and not generated. This change is unlikely to cause any issues for API callers given they will still be able to receive the reports they currently receive without any changes. Additionally, this feature does not break any pre-existing API or web functionality. Gecko: No signal (Original request: https://github.com/mozilla/standards-positions/issues/791) WebKit: No signal (Original request: https://github.com/WebKit/standards-positions/issues/180) 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? No Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)? This feature is expected to be supported in Android WebView in the future alongside Android platform support. <https://developers.google.com/privacy-sandbox/private-advertising/attribution-reporting/android> Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ? No, currently this feature is not covered in WPT due to difficulty of adding significant coverage for Attribution Reporting API because of API-mandated delays and noise. However, the feature is covered by comprehensive integration tests (commonly referred to as “interop tests”) that are also reusable by other implementations. Estimated milestones This feature is anticipated to ship as part of Chrome M134 <https://chromiumdash.appspot.com/schedule>. Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5079048977645568 Links to previous Intent discussions Previous I2S: Intent to Ship: Attribution Reporting API <https://groups.google.com/a/chromium.org/g/blink-dev/c/2Rmj5V6FSaY> Intent to Ship: Attribution Reporting features M117 <https://groups.google.com/a/chromium.org/g/blink-dev/c/nWF61c8xu-M/m/uMmH1ewcAQAJ> Intent to Ship: Attribution Reporting features M118 <https://groups.google.com/a/chromium.org/g/blink-dev/c/Mh-mJiyJZFk/m/HlgzpphYBQAJ> Intent to Ship: Attribution Reporting features M119 <https://groups.google.com/a/chromium.org/g/blink-dev/c/6e44SBtEtcQ> Intent to Ship: Attribution Reporting features M120 <https://groups.google.com/a/chromium.org/g/blink-dev/c/jSk3xpNPzGQ/m/VZPsdYgGCAAJ> Intent to Ship: Attribution Reporting features M121 <https://groups.google.com/a/chromium.org/g/blink-dev/c/g9KiC6Rg_mA/m/V679WcWuAQAJ> Intent to Ship: Attribution Reporting features M123 <https://groups.google.com/a/chromium.org/g/blink-dev/c/NE7VGke1Bjc/m/bIX00t4CAAAJ> Intent to Ship: Attribution Reporting features M124 <https://groups.google.com/a/chromium.org/g/blink-dev/c/aregp1li6xk/m/IhBB2z8tBQAJ> Intent to Ship: Attribution Reporting features M125 <https://groups.google.com/a/chromium.org/g/blink-dev/c/9UyhI6SRyxM/m/zgWWckgWAQAJ> Intent to Ship: Attribution Reporting features M126 <https://groups.google.com/a/chromium.org/g/blink-dev/c/7UQR2lPn5KE/m/q_kL6ZiJDgAJ> Intent to Ship: Attribution Reporting features M127 <https://groups.google.com/a/chromium.org/g/blink-dev/c/LAgnyPsJyJg?pli=1> Intent to Ship: Attribution Reporting features M128 (1) <https://groups.google.com/a/chromium.org/g/blink-dev/c/qlsv7fn0zRE/m/SK8upePCCAAJ> Intent to Ship: Attribution Reporting features M128 (2) <https://groups.google.com/a/chromium.org/g/blink-dev/c/VKGn41wMYlg/m/VsNXktqvCAAJ> Intent to Ship: Attribution Reporting features M130 <https://groups.google.com/a/chromium.org/g/blink-dev/c/-K2xDYuvmmA/m/Fhp564I7AgAJ> Intent to Ship: Attribution Reporting features M132 (1) <https://groups.google.com/a/chromium.org/g/blink-dev/c/T6i4a_hNeXk/m/Z1WwZTZMAAAJ> Intent to Ship: Attribution Reporting features M132 (2) <https://groups.google.com/a/chromium.org/g/blink-dev/c/pc6n8o-S_Ns/m/sWah9fSmAQAJ> -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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