The government uses ToTok to track conversations, locations, images and other data of those who install the app on their phones, The New York Times reported.

The group offered shelter and other help for a few weeks to Snowden in 2013, who is wanted in the United States for leaking classified documents from the National Security Agency that exposed the scope of massive American government surveillance operations.

The spies were also seeking to retrieve cyberweapons stolen from the National Security Agency.

The program gathers information from foreigners overseas but incidentally collects an unknown amount of communications belonging to Americans.

Russian hackers attacked at least one U.S. voting software supplier days before last year's presidential election, according to a government intelligence report leaked Monday that suggests election-related hacking penetrated further into U.S. voting systems than previously known.

The decision by U.S. President Donald Trump to fire FBI director James Comey is alarming and part of a global shift away from democratic controls over powerful people, former intelligence officer Edward Snowden said Tuesday night.

A contractor for the NSA has been arrested on charges that he illegally removed highly classified information and stored the material in his house and car.

National Security Agency leaker Edward Snowden says he intends to vote in the U.S. presidential election, but did not say which candidate he favours.

The leak of what purports to be a NSA hacking kit has set the information security world atwitter and sent major companies rushing to update their defences.

Edward Snowden will appear via video link as a featured speaker at a New Hampshire convention of libertarian activists.