Pass on passwords with scp

$ ssh-keygen -t rsa

Generating public/private rsa key pair
Enter file in which to save the key ... (Enter)

Enter passphrase (empty for no passphrase): (Enter twice)

Copy key to remote box & login there:
$ scp id_rsa.pub user@remote:/home/user
$ ssh user@remote


$ cat id_rsa.key >> /home/user/authorized_keys