Updatable Private Set Intersection

Private set intersection (PSI) enables two parties, each holding a private set of elements, to compute the intersection of their sets without revealing anything beyond the intersection. Updatable PSI (UPSI) extends this functionality, allowing the parties to compute PSI on a regular basis with sets that get updated over time. The goal is to support efficient PSI computations that scale with the size of the updates rather than the entire sets. In this talk, I will give an overview of recent developments in UPSI, including the main results, core techniques, ongoing efforts, and open problems.