Lock Down Admin plugin secure your WordPress admin panel. It locks the wp-admin url and if this plugin is activated then user can't login in the admin panel using wp-admin/wp-login default URL's.
Admin Bruteforce Protection was designed to manage the access to WordPress administrator login page. Plugin creates the wall between your login page and the hackers and adds a higher level of security to your website.
wSecure hides admin URL so that default URL will no longer bring up the admin page. Only people who enter the secret key will be able to access admin area.