Change Birational maps to 4-isogenous maps

crate-crypto / Ed448-Goldilocks

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Change Birational maps to 4-isogenous maps #18

Open kevaundray opened 4 years ago

kevaundray commented 4 years ago

The birational map from Curve448 will lead to a different Edwards Curve with a massive d value and not Ed448-Goldilocks.

kevaundray commented 4 years ago

This is partially completed. Currently, the implementation computes the isogeny from the Ed448-Goldilocks to Curve448, but not the other way. Tests are added in the Montgomery module.