You strip off your clothing, all perfectly in private, walk into a room, spread your legs on the little yellow footprints, and raise your arms. Meanwhile someone or some people, a man or a woman, or men or women, you won't know which, watch you from behind a one way mirror. On command, you turn and expose the other side.

Oh, and so they won't see your face, you can wear a bag over your head. You exit, put your clothing back on, again, perfectly in private, and exit.

On the way out, a friendly TSA agent will say something like "have a nice day."

Now, other than the physical disrobing and the bag on the head, this exactly how the Junkatron works, although you have an excellent chance of being groped even after you go through the Chertoffomizer.