title: Facebook Tutorial > Secure Page Tab URL requirements on October 1, 2011
body: <p>I was wondering what this information means exactly:</p>
  
  <p>October 1: All Canvas apps must process signed_request (fb_sig will be removed) and obtain an SSL certificate (unless you are in Sandbox mode). </p>
  
  <p>Does anybody have more detailed information on what will happen on the 1st october and the tutorial about how we should switch to secure page tab URL? Will all the applications be unaccessible if we don't do this?</p>
  
  <p>Thank you!</p>