Efficient precomputation schemes of kP+lQ

  • Authors:
  • Qiping Lin;Fangguo Zhang

  • Affiliations:
  • School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510006, PR China;School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510006, PR China

  • Venue:
  • Information Processing Letters
  • Year:
  • 2012

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Abstract

Many efficient multiple scalar multiplications have to compute the form kP+lQ. And if the points P and Q are unknown before the computation of multiple scalar multiplications, we have to precompute and store some points as fast as possible. This paper proposes an efficient precomputation scheme of kP+lQ by using conjugate and co-Z addition formulas where k and l are integers, and P and Q are points on a curve. To compute c"iP+/-d"iQ where c"i,d"i@?{1,3,5,...,m}, our scheme is more efficient than others.