A look at Tel Aviv-based Rayzone, whose surveillance system Echo, sold to governments, exploits ad data to track people via their phones (Ryan Gallagher/Bloomberg)

Ryan Gallagher / Bloomberg:

A look at Tel Aviv-based Rayzone, whose surveillance system Echo, sold to governments, exploits ad data to track people via their phones  —  The innovation at the heart of the advertising technology industry is automated auctions to trade real-time data about mobile phone users …

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