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Cryptanalysis of a threshold proxy signature with known signers

Authors:
Fuw-Yi Yang
Jinn-Ke Jan
Woei-Jiunn Jeng
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URL: http://eprint.iacr.org/2004/313
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Abstract: A scheme of threshold proxy signature with known signers was proposed by Hwang et al. In their scheme, the receiver can identify the proxy signers that actually generated a proxy signature. Tzeng et al. demonstrated that this signature scheme is insecure and proposed an improvement to mend the information leakage. This paper shows that the improved scheme is still insecure under the original signer??s forgery attack.
BibTeX
@misc{eprint-2004-12279,
  title={Cryptanalysis of a threshold proxy signature with known signers},
  booktitle={IACR Eprint archive},
  keywords={cryptographic protocols / proxy signature, threshold proxy signature},
  url={http://eprint.iacr.org/2004/313},
  note={ jkjan@cs.nchu.edu.tw 12739 received 16 Nov 2004},
  author={Fuw-Yi Yang and Jinn-Ke Jan and Woei-Jiunn Jeng},
  year=2004
}