Secret Knock Passcode Screen!!! Please Register or Log in to view images I refuse to take very much credit for this Passcode screen because I got the idea and most of the files from the Invisible Passcode Lock Screen!!! thread. All I did was realize the potential of the Invisible Passcode Keypad and adapt it to my own idea. Attached are the files needed to add the Secret Knock Passcode Screen to your iPod Touch/iPhone. The ReadMe.txt in the attached zip file should answer any questions. Please share your thoughts.