I have been through IST multiple times, they will check your passport at security however no Turkish visa is required.
From the IST website
Transfer Passengers:(International Transfer Passengers With An
International Connection Flight) A boarding card is issued for the passenger (if not issued in the country of origin) at the transit desk of the relevant handling company on the Arrivals floor. The passenger does not go through passport control. Instead, he/she directly proceeds through the transit area into the International Departures area. Baggage will be automatically transferred to the connecting flight.