Algorithms for Multi-exponentiation

  • Authors:
  • Bodo Möller

  • Affiliations:
  • -

  • Venue:
  • SAC '01 Revised Papers from the 8th Annual International Workshop on Selected Areas in Cryptography
  • Year:
  • 2001

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Abstract

This paper compares different approaches for computing power products Π1≤i≤k giei in commutative groups. We look at the conventional simultaneous exponentiation approach and present an alternative strategy, interleaving exponentiation. Our comparison shows that in general groups, sometimes the conventional method and sometimes interleaving exponentiation is more efficient. In groups where inverting elements is easy (e.g. elliptic curves), interleaving exponentiation with signed exponent recoding usually wins over the conventional method.