The NSA's principal tool to exploit the Google and Yahoo data links is a project called MUSCULAR, operated jointly with the agency's British counterpart, GCHQ. The Post said NSA and GCHQ are copying entire data flows across fiber-optic cables that carry information between the data centers of the Silicon Valley giants.
The NSA has a separate data-gathering program, called PRISM, which uses a court order to compel Yahoo, Google and other Internet companies to provide certain data. It allows the NSA to reach into the companies' data streams and grab emails, video chats, pictures and more. U.S. officials have said the program is narrowly focused on foreign targets, and technology companies say they turn over information only if required by court order.
In an interview with Bloomberg News Wednesday, NSA Director Gen. Keith Alexander was asked if the NSA has infiltrated Yahoo and Google databases, as detailed in the Post story.
"Not to my knowledge," said Alexander. "We are not authorized to go into a U.S. company's servers and take data. We'd have to go through a court process for doing that."
It was not clear, however, whether Alexander had any immediate knowledge of the latest disclosure in the Post report. Instead, he appeared to speak more about the PRISM program and its legal parameters.
In a separate statement, NSA spokeswoman Vanee Vines said NSA has "multiple authorities" to accomplish its mission, and she said "the assertion that we collect vast quantities of U.S. persons' data from this type of collection is also not true." At no point did the NSA deny the existence of the MUSCULAR program.
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