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Modified Huang-Wang's Convertible Nominative Signature Scheme

Authors:
Wei Zhao
Dingfeng Ye
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URL: http://eprint.iacr.org/2008/337
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Abstract: At ACISP 2004, Huang and Wang first introduced the concept of convertible nominative signatures and also proposed a concrete scheme. However, it was pointed out by many works that Huang-Wang's scheme is in fact not a nominative signature. In this paper, we first present a security model for convertible nominative signatures. The properties of Unforgeability, Invisibility, Non-impersonation and Non-repudiation in the setting of convertible nominative signatures are defined formally. Then we modify Huang-Wang's scheme into a secure one. Formal proofs are provided to show that the modified Huang-Wang's scheme satisfies all the security properties under some conventional assumptions in the random oracle model.
BibTeX
@misc{eprint-2008-18014,
  title={Modified Huang-Wang's Convertible Nominative Signature Scheme},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / digital signatures, anonymity},
  url={http://eprint.iacr.org/2008/337},
  note={This paper is the full version of the paper that will be published in TurstCom2008. wzh@is.ac.cn 14095 received 3 Aug 2008},
  author={Wei Zhao and Dingfeng Ye},
  year=2008
}