On 5/31/24 11:40 PM, Paul Jensen wrote:
Contact emails
pauljen...@chromium.org
Explainer
https://github.com/WICG/turtledove/pull/1095
<https://github.com/WICG/turtledove/pull/1095>
Specification
https://github.com/WICG/turtledove/pull/1124
<https://github.com/WICG/turtledove/pull/1124>
Summary
The Protected Audience API allows bidders to store information, called
an interest group, from a single site in the browser that can only be
read later in the context of an auction. Today, interest groups can
be updated by fetching new values from a server. For all interest
groups, the frequency of these updates is rate limited to at most once
a day to conserve network traffic and avoid overwhelming servers.
However, we've heard from developers that certain ad campaigns need
much more timely updates. During Protected Audience auctions, the
browser fetches real-time signals from bidders' key-value servers.
This proposal allows the response to these fetches to indicate a
subset of interest groups they’d like updated more frequently than
once a day.
Blink component
Blink>InterestGroups
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EInterestGroups>
TAG review
For Protected Audience:
https://github.com/w3ctag/design-reviews/issues/723
<https://github.com/w3ctag/design-reviews/issues/723>
TAG review status
Completed for Protected Audience, resolved unsatisfied.
Risks
Interoperability and Compatibility
Feature represents optional new behavior that shouldn’t break existing
usage.
Gecko & WebKit: No signal on parent proposal, Protected Audience.
Asked in the Mozilla forumhere
<https://github.com/mozilla/standards-positions/issues/770>, and in
the Webkit forum here
<https://github.com/WebKit/standards-positions/issues/158>.
Edge: Edge has announced plans to support the Ad Selection API
<https://github.com/WICG/privacy-preserving-ads/blob/main/README.md>which
shares much of its API surface with Protected Audience.
Web developers:
Feature requested by Microsoft in GitHub issue
<https://github.com/WICG/turtledove/issues/729>.
I don't see any feedback from Microsoft on this design in the issue
(just from Criteo, which seems inconclusive). Have they given feedback
elsewhere?
Debuggability
Protected Audience trusted bidding signals show up in the DevTools
Network pane. Updates show up in the Application -> Storage ->
Interest Groups DevTools pane.
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?
It will be supported on all platforms that support Protected Audience,
so all but WebView.
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes
<https://github.com/web-platform-tests/wpt/blob/f118165cd650448765d2e0efd3d7ee71f1e15e4f/fledge/tentative/trusted-bidding-signals.https.window.js#L973>.
Flag name on chrome://flags
None
Finch feature name
InterestGroupUpdateIfOlderThan
Requires code in //chrome?
False
Estimated milestones
Shipping on desktop and Android in M125.
Anticipated spec changes
None
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5162656775536640
<https://chromestatus.com/feature/5162656775536640>
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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