Arithmetic of split kummer surfaces: montgomery endomorphism of Edwards products

  • Authors:
  • David Kohel

  • Affiliations:
  • Institut de Mathématiques de Luminy, Université de la Méditerranée, Marseille Cedex 9, France

  • Venue:
  • IWCC'11 Proceedings of the Third international conference on Coding and cryptology
  • Year:
  • 2011

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Abstract

Let E be an elliptic curve, K1 its Kummer curve E/{±1}, E2 its square product, and K2 the split Kummer surface E2/{±1}. The addition law on E2 gives a large endomorphism ring, which induce endomorphisms of K2. With a view to the practical applications to scalar multiplication on K1, we study the explicit arithmetic of K2.