A novel construction of SDVS with secure disavowability

  • Authors:
  • Bo Yang;Yong Yu;Ying Sun

  • Affiliations:
  • School of Computer Science, Shaanxi Normal University, Xi'an, China 710062;School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China 611731;Department of Information Technology, Sichuan Electric Power Research Institute, Chengdu, China 610072

  • Venue:
  • Cluster Computing
  • Year:
  • 2013

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Abstract

Designated verifier signature (DVS) and strong designated verifier signature (SDVS) exhibit perfect non-transferability, but does not provide secure disavowability or non-repudiation, which makes them more like a message authentication code rather than a digital signature. In these kinds of cryptographic primitives, the signer has to bear the responsibility of some "forged" signatures produced by the designated verifier. Therefore, it's highly essential to construct a strong designated verifier signature scheme with secure disavowability. In this paper, we resolve this problem by proposing a novel construction of a strong designated verifier signature with secure disavowability. The new scheme makes use of a chameleon hash function and supports the signer to have a complete control of his signature. The proposed scheme achieves unforgeability, non-transferability and secure disavowability. Compared with the previous constructions, the new proposal achieves higher computational efficiency and shorter signature length.