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Cryptanalysis of Publicly Verifiable Authenticated Encryption
Ting-Yi CHANG Chou-Chen YANG Min-Shiang HWANG
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/06/01
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Information Security
authenticated encryption scheme, discrete logarithms, signcryption,
Full Text: PDF(55.1KB)>>
Recently, Ma and Chen proposed a new authenticated encryption scheme with public verifiability. The signer can generate a signature with message recovery for a specified recipient. With a dispute, the recipient has ability to convert the signature into an ordinary one that can be verified by anyone without divulging her/his private key and the message. However, we point out that any adversary can forge a converted signature in this article.