--- sshd_config.orig
+++ sshd_config
@@ -58,7 +58,7 @@
 #IgnoreRhosts yes

 # To disable tunneled clear text passwords, change to "no" here!
-#PasswordAuthentication yes
+PasswordAuthentication no
 #PermitEmptyPasswords no

 # Change to "no" to disable keyboard-interactive authentication.  Depending on