TechCrunch: How “anonymous” wifi data can still be a privacy risk

TechCrunch: How “anonymous” wifi data can still be a privacy risk. “The thorny issue of tracking of location data without risking individual privacy is very neatly illustrated via a Freedom of Information (FOI) request asking London’s transport regulator to release the ‘anonymized’ data-set it generated from a four week trial last year when it tracked metro users in the UK capital via wi-fi nodes and the MAC address of their smartphones as they traveled around its network.”

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