2nd International ICST Conference on Scalable Information Systems

Research Article

A verifiably encrypted signature scheme with strong unforgeability

Download44 downloads
  • @INPROCEEDINGS{10.4108/infoscale.2007.935,
        author={Jianhong Zhang},
        title={A verifiably encrypted signature scheme with strong unforgeability},
        proceedings={2nd International ICST Conference on Scalable Information Systems},
        proceedings_a={INFOSCALE},
        year={2010},
        month={5},
        keywords={Verifiably encryption proof security analysis},
        doi={10.4108/infoscale.2007.935}
    }
    
  • Jianhong Zhang
    Year: 2010
    A verifiably encrypted signature scheme with strong unforgeability
    INFOSCALE
    ICST
    DOI: 10.4108/infoscale.2007.935
Jianhong Zhang1,*
  • 1: College of sciences North China University of Technology Shijingshan District, Beijing, China State Key Laboratory of Information Security, Institute of Software of Chinese Academy of Sciences, Beijing, 100039,
*Contact email: jhzhangs@163.com

Abstract

A verifiably encrypted signature can convince the verifier that a given cipher-text is the encryption of a signature on a given message. It is often used as a building block to construct optimistic fair exchange. In this paper, first we define a stronger unforgeable model, then give a variant of Cha-Cheon's signature [8] and construct a verifiably encrypted signature based on this variant scheme. Finally, the scheme is proven to secure in random oracle model. In comparison with Gu et. al's verifiably encrypted signature scheme, our scheme is more efficient with respect to the size of signature and computation cost of signature.