embedded iframes....verify facebook session?

Dec 11, 2009 at 11:14 PM


I have a Facebook App developed with the toolkit.  I currently have a CanvasIFrameBasePage embedded in another CanvasIFrameBasePage.  I'm currently passing all my get parameters to the embedded iframe on load.  I don't understand how to know if this is in anyway secure.  How do i verify that the person is really who they are?