Certificateless strong designated verifier multisignature scheme using bilinear pairings

  • Authors:
  • Sk Hafizul Islam;G. P. Biswas

  • Affiliations:
  • Indian School of Mines Dhanbad, Jharkhand, India;Indian School of Mines Dhanbad, Jharkhand, India

  • Venue:
  • Proceedings of the International Conference on Advances in Computing, Communications and Informatics
  • Year:
  • 2012

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Abstract

The certificateless public key cryptography (CL-PKC) is a new paradigm of modern cryptography, which was proposed to simplify the certificate management problem of PKC and to avoid the key escrow problem of identity-based cryptosystem (IBC). In this paper, we proposed an efficient and secure certificateless strong designated verifier multisignature (CL-SDVMS) scheme using elliptic curve cryptography (ECC) and bilinear pairings. The proposed CL-SDVMS scheme allows a group of signers to generate a common signature on the same message intended to a designated verifier for verification. The length of the final multisignature is independent of the number of signers and identical to the length of the individual signatures, and the verification time of the multisignature is the same as the time needs to verify any individual signature generated by a signer. In addition, our multisignature scheme can be verified by a designated verifier only; however, he cannot claim to a third-party that the signature is computed by the signers or himself. The proposed scheme satisfies the properties of singer's privacy protection, strongness, non-transferability and source hiding of an SDVS scheme and is unforgeable against the adversaries of different capabilities. The proposed CL-SDVMS scheme is useful where a single document needs to be authenticated by a set of persons and applicable in various applications like decision making processes, petitions, workflow systems etc.