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Diffstat (limited to 'pyecsca/ec/efd/twisted/coordinates')
| -rw-r--r-- | pyecsca/ec/efd/twisted/coordinates | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/pyecsca/ec/efd/twisted/coordinates b/pyecsca/ec/efd/twisted/coordinates index 1a0d32d..bf62fff 100644 --- a/pyecsca/ec/efd/twisted/coordinates +++ b/pyecsca/ec/efd/twisted/coordinates @@ -4,6 +4,7 @@ parameter d coordinate x coordinate y satisfying a*x^2+y^2 == 1+d*x^2*y^2 +ysquared (a*x^2-1)/(d*x^2-1) addition x = (x1*y2+y1*x2)/(1+d*x1*x2*y1*y2) addition y = (y1*y2-a*x1*x2)/(1-d*x1*x2*y1*y2) doubling x = (x1*y1+y1*x1)/(1+d*x1*x1*y1*y1) |