The documents, published Monday by
The size and scope of the program aren't publicly known, but the reports suggest that U.S. and British intelligence easily get routine access to data generated by apps such as the Angry Birds game franchise or the Google Maps navigation service.
The joint spying program ``effectively means that anyone using Google Maps on a smartphone is working in support of a GCHQ system,'' one 2008 document from the British eavesdropping agency is quoted as saying. Another document _ a hand-drawn picture of a smirking fairy conjuring up a tottering pile of papers over a table marked ``LEAVE TRAFFIC HERE'' _ suggests that gathering the data doesn't take much effort.
The NSA did not directly comment on the reports but said in a statement Monday that the communications of those who were not ``valid foreign intelligence targets'' were not of interest to the spy agency.
``Any implication that NSA's foreign intelligence collection is focused on the smartphone or social media communications of everyday Americans is not true,'' the statement said. ``We collect only those communications that we are authorized by law to collect for valid foreign intelligence and counterintelligence purposes _ regardless of the technical means used by the targets.''
GCHQ said it did not comment on intelligence matters, but insisted that all of its activity was ``authorized, necessary and proportionate.''
Intelligence agencies' interest in mobile phones and the networks they run on has been documented in several of Snowden's previous disclosures, but the focus on apps shows how everyday, innocuous-looking pieces of software can be turned into instruments of espionage.
Angry Birds, an addictive birds-versus-pigs game which has been downloaded more than 1.7 billion times worldwide, was one of the most eye-catching examples. The Times and ProPublica said a 2012 British intelligence report laid out how to extract Angry Bird users' information from phones running the Android operating system.
Another document, a 14-page-long NSA slideshow published to the Web, listed a host of other mobile apps, including those made by social networking giant
It wasn't clear precisely what information can be extracted from which apps, but one of the slides gave the example of a user who uploaded a photo using a social media app. Under the words, ``Golden Nugget!'' it said that the data generated by the app could be examined to determine a phone's settings, where it connected to, which websites it had visited, which documents it had downloaded, and who its users' friends were. One of the documents said that apps could even be mined for information about users' political alignment or sexual orientation.
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