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A New Approach to Round-Optimal Secure Multiparty Computation
Date: Friday, October 06, 2017
Time: 10:30 AM to 12:00 PM Note: all times are in the Eastern Time Zone
Event Type: Seminar
Host: Vinod Vaikuntanathan, MIT CSAIL
Contact: Nardos Abbay, firstname.lastname@example.org
TALK: A New Approach to Round-Optimal Secure Multiparty Computation
Abstract: We present a new approach towards constructing round-optimal secure multiparty computation (MPC) protocols against malicious adversaries without trusted setup assumptions. Our approach builds on ideas previously developed in the context of covert multiparty computation [Chandran et al., FOCS07] even though we do not seek covert security. Using our new approach, we obtain the following results:
1) A five round MPC protocol based on the Decisional Diffie-Hellman (DDH) assumption.
2) A four round MPC protocol based on one-way permutations and sub-exponentially secure DDH. This result is optimal in the number of rounds. Previously, no four-round MPC protocol for general functions was known and five-round protocols were only known based on indistinguishability obfuscation (and some additional assumptions) [Garg et al., EUROCRYPT16].
Joint work with Arka Rai Choudhuri (JHU) and Abhishek Jain (JHU)
Created by Nardos Abbay at Wednesday, September 20, 2017 at 5:27 PM.