libpam-ssh 1.92-10 (amd64 binary) in ubuntu maverick

 This pluggable authentication module (PAM) provides single sign-on
 behavior for secure shell (SSH). During login, users type a SSH
 passphrase and is authenticated if the passphrase successfully
 decrypts the user's SSH private keys. In the PAM session phase, an
 ssh-agent process is started and keys are added, and thus users can
 SSH to other hosts that accept key authentication without typing any
 passwords for the entire session.