Welcome to the resource topic for 2019/114
Title:
Fast Multiparty Threshold ECDSA with Fast Trustless Setup
Authors: Rosario Gennaro, Steven Goldfeder
Abstract:A threshold signature scheme enables distributed signing among n players such that any subgroup of size t+1 can sign, whereas any group with t or fewer players cannot. While there exist previous threshold schemes for the ECDSA signature scheme, we present the first protocol that supports multiparty signatures for any t \leq n with efficient, dealerless key generation. Our protocol is faster than previous solutions and significantly reduces the communication complexity as well. We prove our scheme secure against malicious adversaries with a dishonest majority. We implemented our protocol, demonstrating its efficiency and suitability to be deployed in practice.
ePrint: https://eprint.iacr.org/2019/114
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