International Association
for Cryptologic Research

Interoperable Private Attribution (IPA) is a proposed web standard that enables aggregate and differentially private cross site measurement that is purpose constrained to prevent its use for cross site tracking of individuals. IPA is proposed within the Private Advertising Technology Community Group (PATCG) within the World Wide Web Consortium (W3C). Our proposed implementation of IPA uses multi-party computation (MPC) that is performed across a small set of independent organizations and companies who are trusted to not collude. In this talk, we will present the motivation behind our proposal, comparisons to other relevant proposals, progress on the standardization effort, and open problems for extended research.