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Paper: An Attack on Not-interactive Designated Verifier Proofs for Undeniable Signatures

Authors:
Guilin Wang
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URL: http://eprint.iacr.org/2003/243
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Abstract: At Crypto'89, Chaum and van Antwerpen first introduced the concept of undeniable signatures, which has a special property such that a signature cannot be verified without the signer's cooperation. In 1996, Jakobsson, Sako, and Impagliazzo proposed a not-interactive undeniable signature scheme by employing a new primitive called designated verifier proofs. However, this paper shows that their scheme is insecure by demonstrating a simple attack that allows a dishonest signer to convince a designated verifier receiving invalid signatures. In addition, two intuitive countermeasures are presented.
BibTeX
@misc{eprint-2003-11956,
  title={An Attack on Not-interactive Designated Verifier Proofs for Undeniable Signatures},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / digital signature, undeniable signature, designated verifier proof.},
  url={http://eprint.iacr.org/2003/243},
  note={Technical Report. glwang@i2r.a-star.edu.sg 12381 received 25 Nov 2003},
  author={Guilin Wang},
  year=2003
}