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Paper: Attack on Okamoto et al.'s New Short Signature Schemes

Authors:
Fangguo Zhang
Xiaofeng Chen
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URL: http://eprint.iacr.org/2005/240
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Abstract: We present an attack on a new short signature scheme from bilinear pairing proposed by Okamoto $et$ $al.$ at ITCC'05. We show that any one can derive the secret key of the signer from any two message-signature pairs and so can forge the signer's signature for any message. This means the scheme is totally broken.
BibTeX
@misc{eprint-2005-12575,
  title={Attack on Okamoto  et al.'s New Short Signature Schemes},
  booktitle={IACR Eprint archive},
  keywords={Short Signature, Bilinear Pairing, Attack},
  url={http://eprint.iacr.org/2005/240},
  note={2005 China National Computer Conference isdzhfg@zsu.edu.cn 12986 received 21 Jul 2005},
  author={Fangguo Zhang and Xiaofeng Chen},
  year=2005
}