Abstract: Correlated secret randomness is a useful resource for threshold cryptography and secure multiparty computation. A pseudorandom correlation generator (PCG) enables secure deterministic generation of long sources of correlated randomness from short, correlated seeds. The talk will cover the definition of a PCG, constructions of multiparty PCGs for linear correlations using symmetric cryptography (also known as “pseudorandom secret sharing”), and a recent line of work on PCGs for useful nonlinear correlations from different flavors of the Learning Parity with Noise (LPN) assumption. The latter includes practical methods for “silent” OT extension that use much less communication than alternative OT extension techniques.
NIST Workshop on Multi-Party Threshold Schemes (MPTS) 2020. https://csrc.nist.gov/events/2020/mpts2020
Based on joint works with Elette Boyle, Geoffroy Couteau, Ronald Cramer, Ivan Damgård, Niv Gilboa, Lisa Kohl, Peter Rindal, and Peter Scholl.
NIST Workshop on Multi-Party Threshold Schemes 2020
Starts: November 04, 2020Security and Privacy: cryptography