Here are links below which can help you harden your WordPress installation.
These days hacking word press has become childs play.
These days hacking word press has become childs play.
http://codex.wordpress.org/Hardening_WordPress
http://blog.softlayer.com/2012/tips-and-tricks-how-to-secure-wordpress/
http://www.shareaschnitzel.com/how-to-secure-wordpress-wordpress-security/
http://blog.softlayer.com/2012/tips-and-tricks-how-to-secure-wordpress/
http://www.shareaschnitzel.com/how-to-secure-wordpress-wordpress-security/