RFC 7748 - Elliptic Curves for Security https://tools.ietf.org/html/rfc7748
RFC 8032 - Edwards-Curve Digital Signature Algorithm (EdDSA) https://tools.ietf.org/html/rfc8032
Algorithm Identifiers for Ed25519, Ed448, X25519 and X448 for use in the Internet X.509 Public Key Infrastructure https://tools.ietf.org/html/draft-ietf-curdle-pkix
これがいわゆるEdDSA証明書を実現するためのもの
Use of the Elliptic Curve Diffie-Hellman Key Agreement Algorithm with X25519 and X448 in the Cryptographic Message Syntax (CMS) https://tools.ietf.org/html/draft-ietf-curdle-cms-ecdh-new-curves
Use of EdDSA Signatures in the Cryptographic Message Syntax (CMS) https://tools.ietf.org/html/draft-ietf-curdle-cms-eddsa-signatures
これらはS/MIMEとか用
Secure Shell (SSH) Key Exchange Method using Curve25519 and Curve448 https://tools.ietf.org/html/draft-ietf-curdle-ssh-curves
Ed25519 and Ed 448 public key algorithms for the Secure Shell (SSH) protocol https://tools.ietf.org/html/draft-ietf-curdle-ssh-ed25519-ed448
これらはSSH用（OpenSSHはEd25519を既に実装しているけれど、あくまで現時点ではRFCになっていない）
RFC 8031 - Curve25519 and Curve448 for the Internet Key Exchange Protocol Version 2 (IKEv2) Key Agreement https://tools.ietf.org/html/rfc8031
これはIPsec向け
