Further Remarks on Identity-Based RSA Multi-signature

Authors:
Ya-Fen Chang;Yen-Cheng Lai;Mu-Yen Chen
Affiliations:
-;-;-
Venue:
IIH-MSP '09 Proceedings of the 2009 Fifth International Conference on Intelligent Information Hiding and Multimedia Signal Processing
Year:
2009

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Certificateless strong designated verifier multisignature scheme using bilinear pairings

Proceedings of the International Conference on Advances in Computing, Communications and Informatics

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Abstract

RSA is a popular public key cryptology for encryption and signing messages. In 2008, Harn and Ren introduced a new identity-based RSA multi-signature scheme by adopting Shamir’s signature scheme. But, we find that there are some flaws in their proposal: First, the original signer’s signing secret key can be derived. Second, the verification equation will never hold even if the received signature and message are legal. Third, transmission environments are not taken into consideration. This manuscript will thoroughly make discussions on Harn and Ren’s scheme by showing the mentioned flaws.