As I recall from previous scenarios, once on the airport property you can be required to produce ID regardless of if you are inside or outside security. I believe its called the Border Exception or something to that effect. Look around as you drive into the airport, there us usually a sign that says beyond this point you and your property are subject to search, or words to that effect. Thank you Patriot Act.

https://en.m.wikipedia.org/wiki/Border_search_exception