A Universal Forgery on Araki et al.'s Convertible Limited Verifier Signature Scheme

Fangguo ZHANG  Kwangjo KIM  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E86-A   No.2   pp.515-516
Publication Date: 2003/02/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Information Security
signature scheme,  convertible limited verifier signature,  universal forgery,  

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In 1999, Araki et al. proposed a convertible limited verifier signature scheme. In this letter, we propose a universal forgery attack on their scheme. We show that any one can forge a valid signature of a user UA on an arbitrary message.