title: What are the most important keys(keyboard keys) should be disabled in a web site?
body: <p>I'm wondering about how to secure our web sites from external parties. Because as we know, all the source codes are visualized for the others via view source code(form CTRL + u, right click -> view page source, F12) option that is provided by every browsers. So that up to some extent  , we can secure our web pages by restricting those options via disabling keys.</p>
  
  <p>I feel happy that, I have already disabled CTRL, right click and F12 button. Now my source code is bit secured from viewing. </p>
  
  <p>My question is, what are the other important keys(except above mentioned) should be disabled for secure the source code by not showing it to external parties?</p>