2018-02-20 10:37:23 +0200 | received badge | ● Nice Answer (source) |
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2018-02-20 05:38:27 +0200 | answered a question | ed25519 elliptic curve Did you mean Curve25519? It looks like the standard way to write Curve 25519 is already in long Weirstrass form (see the wiki site: wikipedia.org/wiki/Curve25519). In Sage we can build this as:
I verified that the trace matched that listed on the safecurves site. Namely,
The curve used in the signature scheme Ed25519 (as explained on wikipedia.org/wiki/EdDSA#Ed25519 ), is birationaly equivalent to Curve25519, which is what we constructed above. A change of variables is given in the wikipedia entry. I hope this helps, Travis |