After exposing scandalous spy programs of American and British intelligence services, Edward Snowden leaked some info on the Canadian Communications Security Establishment (CSEC).

According to top secret documents, leaked by former NSA contractor, CSEC agents used public Wi-Fi in one of the biggest airports of Canada to track wireless devices of thousands of passengers for days when they left the terminal. Data, collected by the surveillance program, included hotel, cafes, restaurants and other public places visited by passengers, as well as means of transportation.

Canada’s intelligence agency deliberately kept the country’s Federal Court “in the dark” to bypass the law in order to outsource its spying on Canadian citizens abroad to foreign security agencies, a federal judge said.

Federal Court Judge, Richard Mosley, has slammed the Canadian Security Intelligence Service (CSIS) for knowingly misleading him on numerous occasions.

Since 2009, Mosley has issued a large number of warrants to the CSIS, authorizing interception of electronic communications of unidentified Canadians abroad, who were investigated as threats to domestic security.