United States intelligence leaker Edward Snowden has provided his first disclosure of Australian involvement in US global surveillance, identifying four facilities in the country that contribute to a key American intelligence collection program.

Classified US National Security Agency maps leaked by Mr Snowden and published by US journalist Glenn Greenwald in the Brazilian O Globo newspaper reveal the locations of dozens of US and allied signals intelligence collection sites that contribute to interception of telecommunications and internet traffic worldwide.

The US Australian Joint Defence Facility at Pine Gap near Alice Springs and three Australian Signals Directorate facilities: the Shoal Bay Receiving Station near Darwin, the Australian Defence Satellite Communications Facility at Geraldton and the naval communications station HMAS Harman outside Canberra are among contributors to the NSA's collection program codenamed X-Keyscore.

The New Zealand Government Security Communications Bureau facility at Waihopai near Blenheim also contributes to the program.