Departures, Arrivals, Surveillance: Canada Used Airport WiFi Snooparound

Canadian authorities used information culled from a free Internet service at a major national airport to track the wireless devices of scores of travelers. The Communications Security Establishment Canada, or CESC, received information from the unnamed airport's free WiFi system and then used that data to track travelers whose devices later popped up at WiFi locations in other parts of the country. Think of it as a sort of smartphone LoJack system. Locations and telephone numbers called were among the information collected.