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hashtocurve.sage: correct a comment. 

Signed-off-by: Daira Hopwood <daira@jacaranda.org>
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Daira Hopwood 2020-12-31 15:26:20 +00:00
parent 112983e667
commit 391e67f250
1 changed files with 1 additions and 1 deletions
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@ -187,7 +187,7 @@ def map_to_curve_simple_swu(E, Z, h, us, c):
# = (Z * u^3)^2 * (Z/h * h * gx1)
# = (Z * \theta * u^3)^2 * (h * gx1)
#
# When gx1 is not square, y1 is a square root of Z * gx1, and so Z * u^3 * y1
# When gx1 is not square, y1 is a square root of h * gx1, and so Z * \theta * u^3 * y1
# is a square root of gx2. Note that we don't actually need to compute gx2.
y2 = c.mul(theta, c.mul(Zu2, c.mul(u, y1)))