Efficient Implementation of Schoof's Algorithm

  • Authors:
  • Tetsuya Izu;Jun Kogure;Masayuki Noro;Kazuhiro Yokoyama

  • 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

Schoof's algorithm is used to find a secure elliptic curve for cryptosystems, as it can compute the number of rational points on a randomly selected elliptic curve defined over a finite field. By realizing efficient combination of several improvements, such as Atkin-Elkies's method, the isogeny cycles method, and trial search by match-and-sort techniques, we can count the number of rational points on an elliptic curve over GF(p) in a reasonable time, where p is a prime whose size is around 240-bits.