Approximate PSI with Near-Linear Communication

ePrint Report: Approximate PSI with Near-Linear Communication

Wutichai Chongchitmate, Steve Lu, Rafail Ostrovsky

Private Set Intersection (PSI) is a protocol where two parties with individually held confidential sets want to jointly learn (or secret-share) the intersection of these two sets and reveal nothing else to each other. In this paper, we introduce a natural extension of this notion to approximate matching. Specifically, given a distance metric between elements, an approximate PSI (Approx-PSI) allows to run PSI where ``close'' elements match. …

communication confidential eprint report extension intersection learn linear natural near nothing parties private private set intersection protocol report reveal secret share steve