An efficient IND-CCA2 secure Paillier-based cryptosystem

  • Authors:
  • Angsuman Das;Avishek Adhikari

  • Affiliations:
  • Department of Mathematics & Statistics, St. Xaviers College, Kolkata, India;Department of Pure Mathematics, University of Calcutta, Kolkata, India

  • Venue:
  • Information Processing Letters
  • Year:
  • 2012

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Abstract

This paper proposes a provably secure transformation of Paillier cryptosystem into an IND-CCA2 secure one in random oracle model. Our construction exploits the randomness extractability of Paillier cryptosystem for achieving efficiency. Lastly, we compare this conversion with other generic and specific IND-CCA2 conversions in terms of computational overhead and efficiency.