In a cheerfully animated promotional video, a woman narrates Cubic Transportation Systems' vision for the future. Travelers will pay fares using a ticket-free mobile account. Real-time data will be aggregated, linked, and shared. "The more information that is gathered, the more powerful the system becomes," the narrator tells us. "The piece of the puzzle missing ... is you." Over the past decade, Cubic has taken the first steps toward actualizing its vision by snapping up contracts for the development of mobile-based, contactless fare collection systems in eight of America's 10 largest public transit networks. Transit authorities have embraced tap-to-pay technology for its convenience and speed, but privacy advocates are worried that the new fare collection systems pose serious surveillance and security risks. In addition to its transit operation, Cubic is a vast military contractor doing hundreds of millions of dollars in business with the U.S. military and sales to foreign militaries. The company supplies surveillance technologies, training simulators, satellite communications equipment, computing and networking platforms, and other military hardware and software. As Cubic's quiet grip on fare collection takes hold in more cities, the company's ability to process rider data grows with it, creating a sprawling corporate apparatus that has the extraordinary potential to gather up reams of information on the very people it is supposed to serve.