Ed25519 is an EdDSA (Edwards-curve Digital Signature Algorithm) signature scheme using SHA-256/512 and Curve25519 (elliptic curve offering 128 bits of security and designed for use with the elliptic curve Diffie–Hellman (ECDH) key agreement scheme).
See also Trezor Cryptography
Ed25519 with Trezor
See also GPG
The Ed25519 curve and NIST256P1 can be used for SSH login.
See also SSH