Message Recovery for Signature Schemes Based on the Discrete Logarithm Problem
Designs, Codes and Cryptography - Special issue dedicated to Gustavus J. Simmons
A group signature scheme with strong separability
Journal of Systems and Software
Shared Generation of Authenticators and Signatures (Extended Abstract)
CRYPTO '91 Proceedings of the 11th Annual International Cryptology Conference on Advances in Cryptology
Wallet Databases with Observers
CRYPTO '92 Proceedings of the 12th Annual International Cryptology Conference on Advances in Cryptology
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In general, a signature that has been verified by the signers should be valid when the verifiers verify it later. However, a signer-verified signature would become invalid in Wang et al.'s generalized threshold signature and authenticated encryption scheme and Hsu et al.'s revisions. This problem has not been reported before, and it is called the invalid signer-verified signature problem. This paper discusses the problem and proposes the solution. By the way, we also point out the forgery attack on Xia-You recently published group signature scheme.