SSH Public/Private Key Server Settings

I recommend you change the following settings (wherever they appear in the file), from

PermitRootLogin yes
RSAAuthentication yes
#PasswordAuthentication yes
UsePAM yes
	    

to

PermitRootLogin no
RSAAuthentication no
PasswordAuthentication no
UsePAM no
	    

Note the use of UsePAM. On modern Linux, SSH password authentication occurs if UsePAM is yes, even if PasswordAuthentication is set to no, for historical reasons.