Which one is the best of best and free wordpress security plugin?

@crepkop, that plugin takes advantage of a common misunderstanding of how the Web works.

The Web itself is the thing that copies your files and shares them out to people. It does this in the background when you view a website.

See this article http://andrew2nevins.blogspot.co.uk/2013/05/how-to-stop-thieves-copying-your-content.html

Doing anything on the website or “front-end” will be futile to stop people saving and stealing your content and likely harmful against innocent users.

Anyway, I don’t think the original poster was referring to a disabling-right-click plugin.

Contact your hosting provider and use a really good password.