Drawback: Joomla has one drawback, any web user can easily know the site is created in Joomla! by typing the URL to access the administration area (i.e. www.site name.com/administration). This makes hackers hack the site easily once they crack id and password for Joomla!. Information: jSecure Authentication module prevents access to administration (back end) login page without appropriate access key.

Original Source: Joomla! Extensions Directory