Accelerating twisted ate pairing with frobenius map, small scalar multiplication, and multi-pairing

  • Authors:
  • Yumi Sakemi;Shoichi Takeuchi;Yasuyuki Nogami;Yoshitaka Morikawa

  • Affiliations:
  • Graduate School of Natural Science and Technology, Okayama University, Okayama, Okayama, Japan;Graduate School of Natural Science and Technology, Okayama University, Okayama, Okayama, Japan;Graduate School of Natural Science and Technology, Okayama University, Okayama, Okayama, Japan;Graduate School of Natural Science and Technology, Okayama University, Okayama, Okayama, Japan

  • Venue:
  • ICISC'09 Proceedings of the 12th international conference on Information security and cryptology
  • Year:
  • 2009

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Abstract

In the case of Barreto-Naehrig pairing-friendly curves of embedding degree 12 of order r, recent efficient Ate pairings such as R-ate, optimal, and Xate pairings achieve Miller loop lengths of (1/4) ⌊log2r⌋. On the other hand, the twisted Ate pairing requires (3/4) ⌊log2r⌋ loop iterations, and thus is usually slower than the recent efficient Ate pairings. This paper proposes an improved twisted Ate pairing using Frobenius maps and a small scalar multiplication. The proposal splits the Miller's algorithm calculation into several independent parts, for which multi-pairing techniques apply efficiently. The maximum number of loop iterations in Miller's algorithm for the proposed twisted Ate pairing is equal to the (1/4) ⌊log2r⌋ attained by the most efficient Ate pairings.