AuthenticationMethods

https://man7.org/linux/man-pages/man5/sshd_config.5.html

AuthenticationMethods publickey,password publickey,keyboard-interactive

            Note that each authentication method listed should also be
            explicitly enabled in the configuration.

            The available authentication methods are:
            "gssapi-with-mic", "hostbased", "keyboard-interactive",
            "none" (used for access to password-less accounts when
            PermitEmptyPasswords is enabled), "password" and
            "publickey".

PubkeyAuthentication
AuthorizedKeysFile
$HOME/.ssh/authorized_keys

See also

• OTP: Deepnet MobileID, FreeOTP, oathtool, pam_oath, qrencode, google-authenticator, ChallengeResponseAuthentication, AuthenticationMethods
• /etc/ssh/sshd_config(man): AuthenticationMethods, PubkeyAuthentication, PasswordAuthentication, PermitRootLogin, MaxStartups, sshd_config, AllowUsers, Hardening