Welcome to the resource topic for 2019/1360
Title:
Sashimi: Cutting up CSI-FiSh secret keys to produce an actively secure distributed signing protocol
Authors: Daniele Cozzo, Nigel P. smart
Abstract:We present the first actively secure variant of a distributed signature scheme based on isogenies. The protocol produces signatures from the recent CSI-FiSh signature scheme. Our scheme works for any access structure, as we use a replicated secret sharing scheme to define the underlying secret sharing; as such it is only practical when the number of maximally unqualified sets is relatively small. This, however, includes the important case of full threshold, and (n,t)-threshold schemes when n is small.
ePrint: https://eprint.iacr.org/2019/1360
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