Modified Huang-Wang's Convertible Nominative Signature Scheme

Wei Zhao; Dingfeng Ye

Paper 2008/337

Modified Huang-Wang's Convertible Nominative Signature Scheme

Wei Zhao and Dingfeng Ye

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.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. This paper is the full version of the paper that will be published in TurstCom2008.
Keywords: digital signatures anonymity
Contact author(s): wzh @ is ac cn
History: 2008-08-11: received
Short URL: https://ia.cr/2008/337
License: CC BY

BibTeX

@misc{cryptoeprint:2008/337,
      author = {Wei Zhao and Dingfeng Ye},
      title = {Modified Huang-Wang's Convertible Nominative Signature Scheme},
      howpublished = {Cryptology {ePrint} Archive, Paper 2008/337},
      year = {2008},
      url = {https://eprint.iacr.org/2008/337}
}