[Resource Topic] 2003/016: A Threshold GQ Signature Scheme

Welcome to the resource topic for 2003/016

Title:
A Threshold GQ Signature Scheme

Authors: Cheng-Kang Chu, Li-Shan Liu, Wen-Guey Tzeng

Abstract:

We proposed the first threshold GQ signature scheme. The scheme is unforgeable and robust against any adaptive adversary if the base GQ signature scheme is unforgeable under the chosen message attack and computing the discrete logarithm modulo a safe prime is hard. Our scheme achieve optimal resilience, that is, the adversary can corrupt up to a half of the players. As an extension of our work, we proposed a threshold forward-secure signature scheme, which is the threshold version of the most efficient forward-secure signature scheme up to now.

ePrint: https://eprint.iacr.org/2003/016

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