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Meeting materials for the Private Advertising Technology Community Group
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Agenda Request - Hybrid Proposal Design #175

Closed bmcase closed 7 months ago

bmcase commented 7 months ago

Agenda+: Hybrid Proposal Design

The teams from Meta and Mozilla would like to share a new hybrid proposal for private ads measurement. As shown in the IPA-PAM-ARA comparison work, no proposal has the advantage in all of the key dimensions. We would like to propose a hybrid proposal that builds upon the strengths of the previous proposals PAM, IPA and summary ARA. In particular, our goal is to keep the data minimization and explainability of PAM and combine it with the delay-related and fraud mitigation advantages of IPA. PAM and IPA both in turn build on many of the ideas from summary ARA in doing on-device attribution and outputting aggregated histograms.

We achieve this hybrid by using short-lived random identifiers (impression-specific match keys) generated by the device. Attribution and DP budgeting can remain on device while impression and conversion reports can be generated and sent off the device without delays and joined together using the random identifiers in an MPC reminiscent of IPA.

We have three documents to share

  1. Proposal
  2. Presentation
  3. On-device DP budget management

The DP budget management is work done together with Roxana Geambasu and her research team. There is still work in progress to fully align the theory of on-device DP budget management with all of the setup of this hybrid design; we try callout throughout where there is still work TBD.

Time Requested: 2hrs Tuesday + 2hrs Wednesday

It would be nice if we can spend a lot of time in Boston discussing this. We propose to break the discussion into two main sections:

  1. On Tuesday we can give an overview of the proposal using the above presentation and have discussion. We should probably take about 2hrs for this.
  2. On Wednesday we’d like to have another 2hr slot to present the DP budget management work and have discussion (we’ll share some more slides for this before the presentation -- update to add link).

Links

Links to the three documents are above. We will also work on uploading copies of these docs in a new individual drafts folder so we can have a more organized place for folks to file issues relevant to this hybrid proposal.

Update -- link to individual drafts folder: https://github.com/patcg-individual-drafts/hybrid-proposal

AramZS commented 7 months ago

Big chunk of time! Ok, we'll reserve.

bmcase commented 7 months ago

Thanks @AramZS!

bmcase commented 7 months ago

Added link to DP presentation slides.

Also created individual drafts folder: https://github.com/patcg-individual-drafts/hybrid-proposal