diff options
Diffstat (limited to 'pyecsca/ec/efd/shortw/projective-1/addition/add-2002-bj-2')
| -rw-r--r-- | pyecsca/ec/efd/shortw/projective-1/addition/add-2002-bj-2 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/pyecsca/ec/efd/shortw/projective-1/addition/add-2002-bj-2 b/pyecsca/ec/efd/shortw/projective-1/addition/add-2002-bj-2 new file mode 100644 index 0000000..f66570c --- /dev/null +++ b/pyecsca/ec/efd/shortw/projective-1/addition/add-2002-bj-2 @@ -0,0 +1,17 @@ +source 2002 Brier--Joye "Weierstrass elliptic curves and side-channel attacks", page 340 +appliesto projective-1 +compute U1 = X1 Z2 +compute U2 = X2 Z1 +compute S1 = Y1 Z2 +compute S2 = Y2 Z1 +compute ZZ = Z1 Z2 +compute T = U1+U2 +compute M = S1+S2 +compute R = (T-ZZ)(T+ZZ)-U1 U2 +compute F = ZZ M +compute L = M F +compute G = T L +compute W = R^2-G +compute X3 = 2 F W +compute Y3 = R(G-2 W)-L^2 +compute Z3 = 2 F F^2 |