Attack on Kang et al.'s Identity-Based Strong Designated Verifier Signature Scheme

Hongzhen Du; Qiaoyan Wen

Paper 2008/297 Original: eprint.iacr.org/2008/297 ↗

Attack on Kang et al.'s Identity-Based Strong Designated Verifier Signature Scheme

Hongzhen Du

Qiaoyan Wen

Abstract

In this paper, we present a universal forgery attack on Kang et al.'s identity-based strong designated verifier signature (IBSDVS) scheme. We show anyone can forge a valid IBSDVS on an arbitrary message without the knowledge of the private key of either the signer or the designated verifier. Moreover, we point out that Kang et al.'s scheme does not satisfy the properties of strongness and non-delegatability. At last, an improved IBSDVS scheme for Kang et al.'s scheme is presented, and it is provably secure and achieves all the requirements for an IBSDVS.

Metadata

Available format(s): PDF
Publication info: Preprint.
History: 2008-09-15: last updated; 2008-07-04: published
Short URL: https://ia.cr/2008/297
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2008/297,
      author = {Hongzhen Du and Qiaoyan Wen},
      title = {Attack on Kang et al.'s Identity-Based Strong Designated Verifier Signature Scheme},
      howpublished = {Cryptology {ePrint} Archive, Paper 2008/297},
      year = {2008},
      url = {https://eprint.iacr.org/2008/297}
}