A code-based 1-out-of-n oblivious transfer based on mceliece assumptions

  • Authors:
  • Mathew K. Preetha;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:
  • ISPEC'12 Proceedings of the 8th international conference on Information Security Practice and Experience
  • Year:
  • 2012

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Abstract

In this paper, we propose an efficient code-based 1-out-of-N oblivious transfer, OT1N, based on McEliece assumptions without invoking the OT12 several times as in the paradigm proposed in [20,6]. We also show that the protocol is computationally secure against passive and active adversaries. To our knowledge, this is the first practical code-based OT1N protocol. The proposed protocol is compared with some existing number-theoretic OT1N protocols for efficiency. Also, the passively secure 1-out-of-2 OT protocol proposed by Dowsley et al. [10] is reviewed. A formal argument of the computational security of the protocol against active adversaries is furnished.