As an answer to the obvious legal challenges of ID-based, cross-media deduplication (currently greater than those faced by third-party cookies), Google Chrome’s Privacy Sandbox, and its related W3C Working Group, provides a framework for advertisers and publishers to leverage a browser-level interest graph while preserving anonymity, through the use of aggregate data and minimum audience thresholds. As key drawbacks, there is little control on the consumer side, and local storage could result in data leaks when coexisting with either shared-identity, third-party cookies, and platform-specific IDs or walled gardens.

We will address these and other issues from a legal perspective (ePrivacy + GDPR, mostly), and your humble host (Sergio Maldonado) will be on his own for this particular mission.

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Gabriela Zanfir-Fortuna is a Senior Counsel for Global Privacy and EU data protection law at the Future of Privacy Forum and former legal officer for the EDPS (Brussels). She holds a PhD in data protection law.

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Elizabeth Renieris is the Founding Director of the Notre Dame IBM Technology Ethics Lab, a Technology and Human Rights Fellow at the Carr Center for Human Rights Policy at the Harvard Kennedy School, and a Fellow at Stanford’s Digital Civil Society Lab. She’s an expert in cross-border data governance, and the ethical and human rights implications of emerging technologies.

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