Efficient strong designated verifier signature schemes without random oracle or with non-delegatability

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

38 Scopus Citations
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Author(s)

  • Qiong Huang
  • Guomin Yang
  • Duncan S. Wong
  • Willy Susilo

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)373-385
Journal / PublicationInternational Journal of Information Security
Volume10
Issue number6
Publication statusPublished - Nov 2011

Abstract

Designated verifier signature (DVS) allows a signer to convince a designated verifier that a signature is generated by the signer without letting the verifier transfer the conviction to others, while the public can still tell that the signature must be generated by one of them. Strong DVS (SDVS) strengthens the latter part by restricting the public from telling whether the signature is generated by one of them or by someone else. In this paper, we propose two new SDVS schemes. Compared with existing SDVS schemes, the first new scheme has almost the same signature size and meanwhile, is proven secure in the standard model, while the existing ones are secure in the random oracle model. It has tight security reduction to the DDH assumption and the security of the underlying pseudorandom functions. Our second new scheme is the first SDVS supporting non-delegatability, the notion of which was introduced by Lipmaa, Wang and Bao in the context of DVS in ICALP 2005. The scheme is efficient and is provably secure in the random oracle model based on the discrete logarithm assumption and Gap Diffie-Hellman assumption. © 2011 Springer-Verlag.

Research Area(s)

  • Non-delegatability, Non-transferability, Signature scheme, Standard model, Strong designated verifier signature