[Resource Topic] 2023/765: Threshold ECDSA in Three Rounds

Welcome to the resource topic for 2023/765

Title:
Threshold ECDSA in Three Rounds

Authors: Jack Doerner, Yashvanth Kondi, Eysa Lee, abhi shelat

Abstract:

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 text.

ePrint: https://eprint.iacr.org/2023/765

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