An efficient IND-CCA2 secure variant of the niederreiter encryption scheme in the standard model

  • Authors:
  • K. Preetha Mathew;Sachin Vasant;Sridhar Venkatesan;C. Pandu Rangan

  • Affiliations:
  • Theoretical Computer Science Lab, Department of Computer Science and Engineering, Indian Institute of Technology Madras, India;Department of Mathematics and Computer Applications, PSG College of Technology, Coimbatore, India;Department of Mathematics and Computer Applications, PSG College of Technology, Coimbatore, India;Theoretical Computer Science Lab, Department of Computer Science and Engineering, Indian Institute of Technology Madras, India

  • Venue:
  • ACISP'12 Proceedings of the 17th Australasian conference on Information Security and Privacy
  • Year:
  • 2012

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Abstract

In this paper, we propose an IND-CCA2 secure code based encryption scheme in the standard model, built on the Niederreiter encryption scheme. The security of the scheme is based on the hardness of the Syndrome Decoding problem and the Goppa Code Distinguishability problem. The system is developed according to the construction similar to IND-CCA2 secure encryption scheme by Peikert and Waters using the lossy trapdoor functions. Compared to the existing IND-CCA2 secure variants due to Dowsley et.al. and Freeman et. al. (using the κ repetition paradigm initiated by Rosen and Segev), our scheme is more efficient as it avoids κ repetitions. This can be considered as the first practical code-based encryption scheme that is IND-CCA2 secure in the standard model.