Abuses of Undeniable Signatures and Their Countermeasures

Kazuo OHTA  Tatsuaki OKAMOTO  Atsushi FUJIOKA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E74-A    No.8    pp.2109-2113
Publication Date: 1991/08/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Issue on Cryptography and Information Security)

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This paper describes an attack that allows plural verifiers to check the validity of a signature simultaneously in Chaum's zero knowledge undeniable signature scheme, where if a malicious person takes part in the attack procedure as one verifier, the non-transitivity of a signature is suspect, and also proposes countermeasures to the attack.