First Public Working Draft: Privacy-Preserving Attribution: Level 1

Privacy-Preserving Attribution: Level 1

https://www.w3.org/TR/2025/WD-privacy-preserving-attribution-20250422/

Published by
 Private Advertising Technology Working Group

Abstract

This specifies a browser API for the measurement of advertising performance. The goal is to produce aggregate statistics about how advertising leads to conversions, without creating a risk to the privacy of individual web users. This API collates information about people from multiple web origins, which could be a significant risk to their privacy. To manage this risk, the information that is gathered is aggregated using an aggregation service that is trusted by the user-agent to perform aggregation within strict limits. Noise is added to the aggregates produced by this service to provide differential privacy. Websites may select an aggregation service from the list of approved aggregation services provided by the user-agent.

Status of the Document

This section describes the status of this document at the time of its publication. A list of current W3C publications and the latest revision of this technical report can be found in the W3C standards and drafts index at https://www.w3.org/TR/. 

This document was published by the Private Advertising Technology Working Group as a First Public Working Draft using the Recommendation track. 

This document is intended to become a W3C Recommendation. 

The (archived) public mailing list public-patwg@w3.org (see instructions) is preferred for discussion of this specification. When sending e-mail, please put the text “privacy-preserving-attribution” in the subject, preferably like this: “[privacy-preserving-attribution] …summary of comment…” 

This document is a First Public Working Draft. 

Publication as a First Public Working Draft does not imply endorsement by W3C and its Members. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress. 

This document was produced by the Private Advertising Technology Working Group. 

This document was produced by a group operating under the W3C Patent Policy. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy. 

This document is governed by the 03 November 2023 W3C Process Document.

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Received on Tuesday, 22 April 2025 06:57:47 UTC