FBI surveillance system partially revealed
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Documents released under the Freedom of Information Act reveal provide details about the FBI's secretive technology for tracing telephone calls and recording conversations during criminal, terrorism and espionage investigations.
The Digital Collection System Network, or DCSNet, allows for the monitoring and recording of land lines, cell phones, push-to-talk phones, and text messages.
Steven Bellovin, a computer science professor at Columbia University, is worried the system lacks adequate security to prevent insiders from stealing information.