A novel nonrepudiable threshold multi-proxy multi-signature scheme with shared verification

Authors:
Baoyuan Kang;Colin Boyd;Ed Dawson
Affiliations:
School of Mathematical Sciences and Computing Technology, Central South University, Chang'sha, Hunan 410075, China and Information Security Institute, Queensland University of Technology, GPO Box ...;Information Security Institute, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia;Information Security Institute, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia
Venue:
Computers and Electrical Engineering
Year:
2009

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Threshold Proxy Signature Schemes

ISW '97 Proceedings of the First International Workshop on Information Security
A nonrepudiable threshold multi-proxy multi-signature scheme with shared verification

Future Generation Computer Systems - Special issue: Computational chemistry and molecular dynamics

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Abstract

Tzeng et al. proposed a new threshold multi-proxy multi-signature scheme with threshold verification. In their scheme, a subset of original signers authenticates a designated proxy group to sign on behalf of the original group. A message m has to be signed by a subset of proxy signers who can represent the proxy group. Then, the proxy signature is sent to the verifier group. A subset of verifiers in the verifier group can also represent the group to authenticate the proxy signature. Subsequently, there are two improved schemes to eliminate the security leak of Tzeng et al.'s scheme. In this paper, we have pointed out the security leakage of the three schemes and further proposed a novel threshold multi-proxy multi-signature scheme with threshold verification.