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Paper: On the Ambiguity of Concurrent Signatures

Authors:
Yi Mu
Fangguo Zhang
Willy Susilo
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URL: http://eprint.iacr.org/2004/096
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Abstract: We point out that the notion of {\em ambiguity} introduced in the concurrent signatures proposed by Chen, Kudla, and Paterson in Eurocrypt 2004 is incorrect. Any third party who observed two signatures can differentiate who has/have produced the signatures by performing the verification algorithm. We note that the model proposed in the paper is sound, but the concrete scheme does not really provide what is required in the model.
BibTeX
@misc{eprint-2004-12069,
  title={On the Ambiguity of Concurrent Signatures},
  booktitle={IACR Eprint archive},
  keywords={cryptographic protocols /},
  url={http://eprint.iacr.org/2004/096},
  note={ ymu@uow.edu.au 12543 received 18 Apr 2004, last revised 26 Apr 2004, withdrawn 4 May 2004},
  author={Yi Mu and Fangguo Zhang and Willy Susilo},
  year=2004
}