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How the ­.s. ­ses Technology to Mine More Data More Quickly

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NSA headquarters

At the National Security Agency in Fort Meade, Md. Disclosures have provided a rare glimpse into the agency's growing reach.

David Burnett/Contact Press Images

When American analysts hunting terrorists sought new ways to comb through the troves of phone records, e-mails, and other data piling up as digital communications exploded over the past decade, they turned to Silicon Valley computer experts who had developed complex equations to thwart Russian mobsters intent on credit card fraud.

From The New York Times
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