The National Security Agency has been sifting through millions of contact lists from personal email and instant-messaging accounts around the world — including those of Americans — in its effort to find possible links to terrorism or other criminal activity, according to a published report.
The Washington Post reported late Monday that the spy agency intercepts hundreds of thousands of email address books every day from private accounts on Yahoo, Gmail, Facebook and Hotmail that move though global data links. The NSA also collects about a half-million buddy lists from live chat services and email accounts.
The Post said it learned about the collection tactics from secret documents provided by NSA leaker Edward Snowden and confirmed by senior intelligence officials. It was the latest revelation of the spy agency’s practices to be disclosed by Snowden, the former NSA systems analyst who fled the U.S. and now resides in Russia.
The newspaper said the NSA analyzes the contacts to map relationships and connections among various foreign intelligence targets. During a typical day last year, the NSA’s Special Source Operations branch collected more than 440,000 email address books, the Post said. That would correspond to a rate of more than 250 million a year.
A spokesman for the national intelligence director’s office, which oversees the NSA, told the Post that the agency was seeking intelligence on valid targets and was not interested in personal information from ordinary Americans.
Spokesman Shawn Turner said the NSA was guided by rules that require the agency to “minimize the acquisition, use and dissemination” of information that identifies U.S. citizens or permanent residents.