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.

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