Edwards-curve Digital Signature Algorithm (EdDSA)
The elliptic curve signature scheme Edwards-curve Digital Signature
Algorithm (EdDSA) is described. The algorithm is instantiated with
recommended parameters for the Curve25519 and Curve448 curves. An
example implementation and test vectors are provided.
NOTE: Anything not about Ed25519 in this document is extremely
premature and there is at least one FIXME that makes some things
unimplementable.