Ed25519

• OpenSSH 6.8: March 18, 2015
  • Added new [email protected] extension to facilitate public key discovery and rotation for trusted hosts (for transition from DSA to Ed25519 public host keys)
  • AuthenticationMethods=publickey,publickey to require that users authenticate using two different public keys

ssh-keygen -e -m PEM -f private_key_in_ed25519_format
do_convert_to_pem: unsupported key type ED25519

See also

• OpenSSH (changelog): /etc/ssh/sshd_config | /etc/ssh/ssh_config | ~/.ssh/ | openSSL | sshd logs | sftp | scp | authorized_keys | ssh-keygen | ssh-keyscan | ssh-add | ssh-agent | ssh | Ssh -O stop | ssh-copy-id | CheckHostIP | UseKeychain, OpenSSF

Murenin, Constantine A. (2015-02-01). Soulskill (ed.). "OpenSSH Will Feature Key Discovery and Rotation For Easier Switching To Ed25519". Slashdot. Retrieved 2015-02-01.

https://lwn.net/Article s/637147/