Crypto Dark Matter on the Torus: Oblivious PRFs from shallow PRFs and FHE

Abstract

In this talk, Prof. Alex Davidson will describe a novel construction of an oblivious pseudorandom function (OPRF) protocol with post-quantum security guarantees, based on (T)FHE and low-depth pseudorandom functions. Classical OPRFs are being standardised by the Internet Engineering Task Force, and their applications (including the Privacy Pass and OPAQUE protocols) require high-performance solutions. While previous post-quantum candidates focus more on feasibility, Alex will show that FHE-based OPRFs appear to provide a viable way forward for realising practically efficient constructions.

About the speakers

Alex is an Assistant Professor in the Computer Science Department at Universidade NOVA de Lisboa. His research focuses on applications of cryptography in the Internet setting, and concrete constructions of primitives from lattice-based assumptions. His recent work focuses on building practical privacy-preserving protocols for data aggregation and retrieval scenarios.

Unable to make it?

After the event has finished, resources (including slides, video, papers, etc) will be available at the resource page at https://fhe.org/meetups/039-Crypto_Dark_Matter_on_the_Torus

Never miss an update

1. The newsletter where we post community announcements: https://fheorg.substack.com/
2. The discord server where you can discuss FHE related topics with the community: https://discord.fhe.org

Make sure to join either (or both) of these to stay informed about future events!