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Profile: Data Acquisition and Intercept Section (FBI) (DAIS)
Data Acquisition and Intercept Section (FBI) (DAIS) was a participant or observer in the following events:
Starting in 1997, the FBI constructs a sophisticated surveillance system that can perform near-instantaneous wiretaps on almost any telephone, cell phone, and Internet communications device, according to documents declassified in August 2007. The system is called the Digital Collection System Network, or DCSNet. It connects FBI wiretapping rooms to switches controlled by land-line operators, Internet-telephony companies, and cellular providers. The documents show that DCSNet is, in reporter Ryan Singel’s words, “far more intricately woven into the nation’s telecom infrastructure than observers suspected.” Steven Bellovin, a computer science professor and surveillance expert, calls DCSNet a “comprehensive wiretap system that intercepts wire-line phones, cellular phones, SMS [short message service, a protocol allowing mobile devices to exchange text messages], and push-to-talk systems.” The system is an entire suite of software that together collects, sifts, and stores phone numbers, phone calls, and text messages. The system directly connects FBI wiretapping offices around the country to a sprawling private communications network. DCSNet is composed of three main clients:
The DCS-3000, also called “Red Hook,” handles pen-registers and trap-and-traces, a type of surveillance that collects signaling information but not communications content.
The DCS-6000, or “Digital Storm,” captures and collects the content—the spoken or written communications—of phone calls and text messages.
The most classified system of the three, the DCS-5000, is used for wiretaps targeting spies or terrorists.
Between the three, the system can allow FBI agents to monitor recorded phone calls and messages in real time, create master wiretap files, send digital recordings to translators, track the location of targets in real time using cell-tower information, and stream intercepts to mobile surveillance vans. The entire system is operated through a private, secure and self-contained backbone that is run for the government by Sprint. Singel gives the following example: “The network allows an FBI agent in New York, for example, to remotely set up a wiretap on a cell phone based in Sacramento, California, and immediately learn the phone’s location, then begin receiving conversations, text messages and voicemail pass codes in New York. With a few keystrokes, the agent can route the recordings to language specialists for translation.” Dialed numbers are subjected to data mining, including so-called “link analysis.” The precise number of US phones being monitored and recorded in this way is classified.
Genesis of DCSNet - The system was made possible by the 1994 Communications Assistance for Law Enforcement Act (CALEA) (see January 1, 1995), which mandated that telecom providers must build “backdoors” in US telephone switches to be used by government wiretappers. CALEA also ordered telecom firms to install only switching equipment that met detailed wiretapping standards. Before CALEA, the FBI would bring a wiretap warrant to a particular telecom, and that firm would itself create a tap. Now, the FBI logs in directly to the telecom networks and monitors a surveillance target itself through DCSNet. FBI special agent Anthony DiClemente, chief of the Data Acquisition and Intercept Section of the FBI’s Operational Technology Division, says the DCS was originally intended in 1997 to be a temporary solution, but has grown into a full-featured CALEA-collection software suite. “CALEA revolutionizes how law enforcement gets intercept information,” he says. “Before CALEA, it was a rudimentary system that mimicked Ma Bell.” Now, under CALEA, phone systems and Internet service providers have been forced to allow DCSNet to access almost all of its data (see 1997-August 2007 and After).
Security Breaches - The system is vulnerable to hacking and security breaches (see 2003). [Wired News, 8/29/2007]
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