New Point Addition Formulae for ECC Applications

  • Authors:
  • Nicolas Meloni

  • Affiliations:
  • Institut de Mathématiques et de Modélisation de Montpellier, Univ. Montpellier 2, France and Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier, CNRS, U ...

  • Venue:
  • WAIFI '07 Proceedings of the 1st international workshop on Arithmetic of Finite Fields
  • Year:
  • 2007

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Abstract

In this paper we propose a new approach to point scalar multiplication on elliptic curves defined over fields of characteristic greater than 3. It is based on new point addition formulae that suit very well to exponentiation algorithms based on Euclidean addition chains. However finding small chains remains a very difficult problem, so we also develop a specific exponentiation algorithm, based on Zeckendorf representation (i.e. representing the scalar kusing Fibonacci numbers instead of powers of 2), which takes advantage of our formulae.