U.K. moves to stop trash cans from tracking people with Wi-Fi

London • Officials demanded Monday that an advertising firm stop using a network of high-tech trash cans to track people walking through London’s financial district. The Renew ad firm has been using technology embedded in the hulking receptacles to measure the Wi-Fi signals emitted by smartphones, and suggested that it would apply the concept of “cookies” — tracking files that follow Internet users across the Web — to the physical world. “We will cookie the street,” Renew Chief Executive Kaveh M...

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