Threshold ECDSA in 3 rounds

Abhi Shelat

10.4.24

Abhi Shelat (Northeastern) identifies a specific rewriting of the ECDSA signing equation and a method to compute and verify it that lends itself to the minimal MPC protocols for distributed key generation and threshold signing. This method for signing is constructed using only idealized commitments and multiplication, and can be instantiated under many different assumptions, yielding different time/bandwidth tradeoffs. Abhi constructs 3 or 2 round signing protocols (with pre-processing) that run in milliseconds, thus eliminating long standing bottlenecks in round complexity for this problem without incurring additional costs elsewhere. This is joint work with Jack Doerner, Yash Kondi, Eysa Lee.

About the presenter

Abhi is a professor at Northeastern University and pseudo-engineer at Google whose demeanor has often led students to confuse him with that other famous Indian comedian who is Master of None.

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