Number-Theoretic Attack on Lyuu-Wu's Multi-proxy Multi-signature Scheme

Y. D. Lyuu and M. L. Wu had proposed an improved multi-proxy multi-signature scheme, which was claimed to resist the forge attack. Lately, L. Guo and G. Wang found an inside attack on the Lyuu-Wu's scheme. In this paper, we propose a new attack on Lyuu-Wu's scheme, which can factor the par...

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Bibliographic Details
Published in:2009 fifth International Conference on Information Assurance and Security : 18-20 August 2009 Vol. 1; pp. 666 - 668
Main Authors: Fanyu Kong, Jia Yu
Format: Conference Proceeding
Language:English
Published: IEEE 01.08.2009
Subjects:
digital signature
Digital signatures
Educational institutions
Information security
Information systems
multi-proxy multi-signature scheme
number-theoretic algorithm
Polynomials
Public key
Resists
security attack
Zinc
ISBN:0769537448, 9780769537443
Online Access:Get full text
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Summary:Y. D. Lyuu and M. L. Wu had proposed an improved multi-proxy multi-signature scheme, which was claimed to resist the forge attack. Lately, L. Guo and G. Wang found an inside attack on the Lyuu-Wu's scheme. In this paper, we propose a new attack on Lyuu-Wu's scheme, which can factor the parameter N and Q by using efficient number-theoretic algorithms when Q is roughly larger than the square root of N. It follows that Lyuu-Wu's scheme suffers from the forge attack from the proxy signers in that case.
ISBN:0769537448
9780769537443
DOI:10.1109/IAS.2009.130