Design of Hyperelliptic Cryptosystems in Small Characteristic and a Software Implementation over F2n

  • Authors:
  • Yasuyuki Sakai;Kouichi Sakurai

  • Affiliations:
  • -;-

  • Venue:
  • ASIACRYPT '98 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
  • Year:
  • 1998

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Abstract

We investigate the discrete logarithm problem over jacobians of hyperelliptic curves suitable for public-key cryptosystems. We focus on the case when the definition field has small characteristic 2, 3, 5 and 7, then we present hyperelliptic cryptosystems that resist against all known attacks. We further implement our designed hyperelliptic cryptosystems over finite fields F2n in software on Alpha and Pentium-II computers. Our results indicate that if we choose curves carefully, hyperelliptic cryptosystems do have practical performance.