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    Presentations 2026
Presentation

Two-party ECDSA Signing at Constant Communication Overhead

January 27, 2026

Presenters

Yashvanth Kondi - Silence Laboratories @ Singapore

Description

Abstract. In this talk, we will present a new protocol for two-party ECDSA signing that simultaneously achieves the best concrete computation and bandwidth efficiency relative to prior work, without compromising on round complexity. On a conceptual level, our protocol only makes blackbox use of generic cryptography—Oblivious Transfer during setup and Pseudorandom Functions when signing—and is asymptotically optimal in communication (linear in the security parameter). The technical insights that underlie our protocol are a Pseudorandom Correlation Function for Vector Oblivious Linear Evaluation over a large ring, and a generalization of proof techniques from previous work.

Presented by Yashvant Kondi. Suggested reading: Two-party ECDSA Signing at Constant Communication Overhead (ia.cr/2025/1813)

Presented at

Presented at MPTS 2026: NIST Workshop on Multi-Party Threshold Schemes

Event Details

Location

    
                            

                    


                    

        
 Related Topics


            

                Security and Privacy:
                    cryptography            

    


            

        

    




    


            Created January 22, 2026, Updated February 11, 2026