What We Need to Know About PRISM

A lot remains uncertain about the number of users affected by the NSA PRISM surveillance program that is taking place, the extent to which companies are involved, and how the NSA handles this sensitive data. Does the NSA regularly collect and examine a huge swath of the cloud communications of American and foreign Internet users? Does the agency present evidence and seek careful judicial review to obtain limited amounts of user data related to individual investigations? Or is the answer somewhere in the middle, with queries being constructed such that algorithms scan most or all of the accounts, identifying a smaller set of "interesting" accounts whose contents are sent to the NSA?

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"If I target for example an email address, for example under FAA 702, and that email address sent something to you, Joe America, the analyst gets it," he said. "All of it. IPs, raw data, content, headers, attachments, everything. And it gets saved for a very long time - and can be extended further with waivers rather than warrants."

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