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On the Authentication of One Popular Signcryption Scheme
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Abstract: | Whether a recipient \textit{can prove} a signature to others is of great importance. The function is just one reason that we call a signature ``signature" rather than others. In this paper, we point out that one popular signcryption signature convinces \textit{only} the designated document's recipient that the signer deliberately signed the document. The \textit{designated recipient} can \textit{check} the validity of a given signcryptext but \textit{cannot prove} it to others. We also improve it using the efficient technique developed in Schnorr's signature instead of a zero-knowledge proof such that the receiver can \textit{check} the validity of a given signcryptext and \textit{can prove} it to a third party. |
BibTeX
@misc{eprint-2007-13652, title={On the Authentication of One Popular Signcryption Scheme}, booktitle={IACR Eprint archive}, keywords={cryptographic protocols / signcryption, universal authentication, restrictive authentication, designated authentication}, url={http://eprint.iacr.org/2007/372}, note={ caozhj@shu.edu.cn 13772 received 15 Sep 2007}, author={Zhengjun Cao}, year=2007 }