How surveillance companies track smartphone users through advertising data
Briefly

How surveillance companies track smartphone users through advertising data
"In 2017, a senior French investigator returning from Milipol, the major biennial trade fair dedicated to state security, had something to confide. Shocked, he informed us he had been approached on the sidelines of the event by "an Israeli company," whose name he did not wish to disclose, that tried to sell him a geolocation tool using advertising data collected from mobile phones."
"Nearly a decade later, what once seemed like science fiction now drives a well-established industry. Today, companies offer services in advertising intelligence (Adint): By collecting the geolocation data of millions of phones worldwide from advertising markets, they promise intelligence or law enforcement agencies the ability to track individuals to within a few meters. According to Le Monde's analysis, around 15 companies, at least, now propose such services."
An industry known as advertising intelligence (Adint) collects geolocation signals from advertising marketplaces to build location profiles of millions of mobile phones worldwide. Companies aggregate data gathered by thousands of ordinary apps that share or sell advertising-derived location data on online marketplaces. Many Adint firms are founded by former intelligence or military personnel and are concentrated in Israel, with others in Europe and the United States. These companies market tools that allow intelligence and law enforcement agencies to locate and track individuals to within a few meters. The practice raises significant privacy and oversight concerns.
Read at Le Monde.fr
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