> ... what I would actually like is the ability to configure OpenSSH to require multiple things to log in, ... With OpenSSH, you can require multiple authentic

> ... what I would actually like is the ability to configure OpenSSH to require multiple things to log in, ... With OpenSSH, you can require multiple authentication methods to succeed before access is granted. For example, "publickey,password" to require password authentication after key-based authentication has succeeded. You could even do "publickey,publickey,publickey" to require three different keys to be used! This has been supported for several years, by the way. See "AuthenticationMethods" in the "sshd_config*" man page.