### A Threshold GQ Signature Scheme

Cheng-Kang Chu, Li-Shan Liu, and 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.

Available format(s)
Category
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
threshold signatureGQ signatureforward-secure signature
Contact author(s)
ckchu @ cis nctu edu tw
History
Short URL
https://ia.cr/2003/016

CC BY

BibTeX

@misc{cryptoeprint:2003/016,
author = {Cheng-Kang Chu and Li-Shan Liu and Wen-Guey Tzeng},
title = {A Threshold GQ Signature Scheme},
howpublished = {Cryptology ePrint Archive, Paper 2003/016},
year = {2003},
note = {\url{https://eprint.iacr.org/2003/016}},
url = {https://eprint.iacr.org/2003/016}
}

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