International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: (Convertible) Undeniable Signatures without Random Oracles

Tsz Hon Yuen
Man Ho Au
Joseph K. Liu
Willy Susilo
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Abstract: We propose a convertible undeniable signature scheme without random oracles. Our construction is based on Waters' and Kurosawa and Heng's schemes that were proposed in Eurocrypt 2005. The security of our scheme is based on the CDH and the decision linear assumption. Comparing only the part of undeniable signatures, our scheme uses more standard assumptions than the existing undeniable signatures without random oracles due to Laguillamie and Vergnaud.
  title={(Convertible) Undeniable Signatures without Random Oracles},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / undeniable signature},
  note={Full version of the paper in ICICS 2007 13787 received 30 Sep 2007},
  author={Tsz Hon Yuen and Man Ho Au and Joseph K. Liu and Willy Susilo},