The image was posted by an Australian Virgin Australia passenger, who was flying co-share on Delta Airlines.Delta publishes an astonishing amount of information, including the E-Ticket number, booking reference, frequent flyer number and even how many bags you have checked in. I decided to test just how vulnerable the system was, and headed to the Delta website.

Under “Manage My Booking” all that is needed is a passenger name and an E-Ticket number or booking reference.As all that was on the boarding card, I was quickly able to log into the booking and see all the passenger’s details.