WASHINGTON — Not long before headlines exposed National Security Agency programs that secretly collect records of Americans’ phone calls, another surveillance system got far less attention: Nordstrom, the department store chain, acknowledged it was tracking customers without their knowledge in 17 stores.
Nordstrom had hired a company to log a unique number emitted by shoppers’ smartphones, which automatically connected to Wi-Fi systems as they moved through the stores. Shortly after a Dallas TV station broke the story in May, Nordstrom announced it was discontinuing the program.
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