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Diffstat (limited to 'pyecsca/ec/efd/shortw/jacobian-0/addition/add-1986-cc')
| -rw-r--r-- | pyecsca/ec/efd/shortw/jacobian-0/addition/add-1986-cc | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/pyecsca/ec/efd/shortw/jacobian-0/addition/add-1986-cc b/pyecsca/ec/efd/shortw/jacobian-0/addition/add-1986-cc new file mode 100644 index 0000000..af536a1 --- /dev/null +++ b/pyecsca/ec/efd/shortw/jacobian-0/addition/add-1986-cc @@ -0,0 +1,10 @@ +source 1986 Chudnovsky--Chudnovsky "Sequences of numbers generated by addition in formal groups and new primality and factorization tests", page 414, formula (4.3i) +compute U1 = X1 Z2^2 +compute U2 = X2 Z1^2 +compute S1 = Y1 Z2^3 +compute S2 = Y2 Z1^3 +compute P = U2-U1 +compute R = S2-S1 +compute X3 = R^2-(U1+U2) P^2 +compute Y3 = R (U1 P^2-X3)-S1 P^3 +compute Z3 = Z1 Z2 P |