How Airlines and Airports Use Your Data, From Security to the Flight Itself

"Since opening in October 2017, Singapore Changi International Airport’s Terminal 4 has stood apart from the rest of the award-winning airport’s terminals—not only because of its food emporium, Peranakan-inspired shophouse facades, and boulevard of 160 fig trees, but also because of its “self-service system,” where passengers can move through the check-in, bag drop, immigration, and boarding processes typically without interacting with a single human. At unmanned luggage booths, your photo is taken and digitally matched against your passport before you can drop your bag off. Your photo is snapped again at immigration, and with a match, the automatic security doors swing open and you’re free to go, all within seconds."