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Room 641A is a telecommunication interception facility operated by AT&T for the U.S. National Security Agency that commenced operations in 2003 and was exposed in 2006.〔〔 ==Description== Room 641A is located in the SBC Communications building at 611 Folsom Street, San Francisco, three floors of which were occupied by AT&T before SBC purchased AT&T.〔 The room was referred to in internal AT&T documents as the ''SG3 (Group 3 ) Secure Room.'' It is fed by fiber optic lines from beam splitters installed in fiber optic trunks carrying Internet backbone traffic〔 and, as analyzed by J. Scott Marcus, a former CTO for GTE and a former adviser to the FCC, has access to all Internet traffic that passes through the building, and therefore "the capability to enable surveillance and analysis of internet content on a massive scale, including both overseas and purely domestic traffic."〔 Former director of the NSA's World Geopolitical and Military Analysis Reporting Group, William Binney, has estimated that 10 to 20 such facilities have been installed throughout the United States.〔 The room measures about and contains several racks of equipment, including a Narus STA 6400, a device designed to intercept and analyze Internet communications at very high speeds.〔 The existence of the room was revealed by former AT&T technician Mark Klein and was the subject of a 2006 class action lawsuit by the Electronic Frontier Foundation against AT&T.〔 Klein claims he was told that similar black rooms are operated at other facilities around the country. Room 641A and the controversies surrounding it were subjects of an episode of ''Frontline'', the current affairs documentary program on PBS. It was originally broadcast on May 15, 2007. It was also featured on PBS's ''NOW'' on March 14, 2008. The room was also covered in the PBS ''Nova'' episode "The Spy Factory". 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Room 641A」の詳細全文を読む スポンサード リンク
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