Field inversion and point halving revisited

  title={Field inversion and point halving revisited},
  author={Kenny Fong and Darrel Hankerson and Julio L{\'o}pez Hernandez and Alfred Menezes},
  journal={IEEE Transactions on Computers},
We present a careful analysis of elliptic curve point multiplication methods that use the point halving technique of Knudsen and Schroeppel and compare these methods to traditional algorithms that use point doubling. The performance advantage of halving methods is clearest in the case of point multiplication kP, where P is not known in advance and smaller field inversion to multiplication ratios generally favor halving. Although halving essentially operates on affine coordinate representations… CONTINUE READING
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