## CryptoDB

### Paper: On the Authentication of One Popular Signcryption Scheme

Authors: Zhengjun Cao URL: http://eprint.iacr.org/2007/372 Search ePrint Search Google 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
}