NSA infiltrates links to Yahoo!, Google data centres worldwide, Edward Snowden documents say
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NSA head denies Yahoo, Google data report
NSA head denies secretly breaking into the main communications links that connect Yahoo and Google data centres around the world.
Washington: The US National Security Agency has secretly broken into the main communications links that connect Yahoo! and Google data centre around the world, according to documents obtained from former NSA contractor Edward Snowden and interviews with knowledgeable officials.
By tapping those links, the agency has positioned itself to collect at will from among hundreds of millions of user accounts, many of them belonging to Americans. The NSA does not keep everything it collects, but it keeps a lot.
According to a top secret accounting dated January 9, 2013, NSA's acquisitions directorate sends millions of records every day from Yahoo! and Google internal networks to data warehouses at the agency's Fort Meade headquarters. In the preceding 30 days, the report said, field collectors had processed and sent back 181,280,466 new records - ranging from "metadata," which would indicate who sent or received emails and when, to content such as text, audio and video.
The NSA's principal tool to exploit the data links is a project called MUSCULAR, operated jointly with the agency's British counterpart, GCHQ. From undisclosed interception points, the NSA and GCHQ are copying entire data flows across fibre-optic cables that carry information between the data centre of the Silicon Valley giants.
The infiltration is especially striking because the NSA, under a separate program known as PRISM, has front-door access to Google and Yahoo! user accounts through a court-approved process.
The MUSCULAR project appears to be an unusually aggressive use of NSA tradecraft against flagship American companies. The agency is built for high-tech spying, with a wide range of digital tools, but it has not been known to use them routinely against US companies.
White House officials and the Office of the Director of National Intelligence, which oversees the NSA, declined to confirm, deny or explain why the agency infiltrates Google and Yahoo! networks overseas.
Google responds
In a statement, Google said it was "troubled by allegations of the government intercepting traffic between our data centre, and we are not aware of this activity."
"We have long been concerned about the possibility of this kind of snooping, which is why we continue to extend encryption across more and more Google services and links," the company said.
At Yahoo!, a spokeswoman said: "We have strict controls in place to protect the security of our data centre, and we have not given access to our data centres to the NSA or to any other government agency."
Under PRISM, the NSA already gathers huge volumes of online communications records by legally compelling US technology companies, including Yahoo! and Google, to turn over any data matching court-approved search terms. That program, which was first disclosed by The Washington Post and the Guardian newspaper, is authorised under Section 702 of the Foreign Intelligence Surveillance Act and overseen by the Foreign Intelligence Surveillance Court.
Avoiding restrictions
Intercepting communications overseas has clear advantages for the NSA, with looser restrictions and less oversight. NSA documents about the effort refer directly to "full take," "bulk access" and "high volume" operations on Yahoo! and Google networks. Such large-scale collection of internet content would be illegal in the United States, but the operations take place overseas, where the NSA is allowed to presume that anyone using a foreign data link is a foreigner.
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