I’d point to the example of an Arizona man who was arrested because law enforcement saw that there were phones moving between a restaurant he owned on the U.S. side of the U.S.-Mexico border and Mexico. They figured out that there was a tunnel there and found a pretense to search his car and found drugs. [They] later got a search warrant to search his restaurant. So, we’ve seen it used in a wide variety of areas, including in situations where the government would otherwise need a warrant or some other sort of court order to get data on American citizens.
You compare to some degree the state of surveillance in China versus the U.S. You write that China wants its citizens to know that they’re being tracked, whereas in the U.S., “the success lies in the secrecy.” What did you mean by that?
That was a line that came in an email from a police officer in the United States who got access to a geolocation tool that allowed him to look at the movement of phones. And he was essentially talking about how great this tool was because it wasn’t widely, publicly known. The police could buy up your geolocation movements and look at them without a warrant. And so he was essentially saying that the success lies in the secrecy, that if people were to know that this was what the police department was doing, they would ditch their phones or they would not download certain apps.