Threshold ECDSA in Three Rounds

ePrint Report: Threshold ECDSA in Three Rounds

Jack Doerner, Yashvanth Kondi, Eysa Lee, abhi shelat

We present a three-round protocol for threshold ECDSA signing with malicious security against a dishonest majority, which information-theoretically UC-realizes a standard threshold signing functionality, assuming ideal commitment and two-party multiplication primitives. Our work improves upon and fully subsumes the DKLs $t$-of-$n$ and 2-of-$n$ protocols. This document focuses on providing a succinct but complete description of the protocol and its security proof, and contains little expository …

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