Paper 2003/243

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

Guilin Wang

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.

Metadata
Available format(s)
PDF PS
Category
Public-key cryptography
Publication info
Published elsewhere. Technical Report.
Keywords
digital signatureundeniable signaturedesignated verifier proof.
Contact author(s)
glwang @ i2r a-star edu sg
History
2003-11-26: received
Short URL
https://ia.cr/2003/243
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2003/243,
      author = {Guilin Wang},
      title = {An Attack on Not-interactive Designated Verifier Proofs for Undeniable Signatures},
      howpublished = {Cryptology ePrint Archive, Paper 2003/243},
      year = {2003},
      note = {\url{https://eprint.iacr.org/2003/243}},
      url = {https://eprint.iacr.org/2003/243}
}
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