- Black room
__NOTOC__While a black room or black chamber is often now used to refer to any place or organisation dedicated to code-breaking, its more exact meaning is a secret room in a
post office, and, later and by extension, a telecommunications center used by state officials to conduct clandestine interception and surveillanceof communications. [http://www.espionageinfo.com/Ba-Bl/Black-Chamber.html Black Chamber at espionageinfo] ] Typically all letters or communications would pass through the black room before being passed to the recipient.
This practice had been in vogue since the establishment of posts, and was frequently used in France by the ministers of
Louis XIIIand his followers as Cabinet noir(French for "black room").
In a modern American
Network Operations Centers, optical splitters divert a percentage of the laser lightfrom all incoming and outgoing fiber-optic cables to the secret room. [http://blog.wired.com/27BStroke6/att_klein_wired.pdf AT&T’s Implementation of NSA Spying on American Citizens] (PDF)] An example is Room 641Ain the SBC Communications building in San Francisco. Activities in a black room do not fall under the concept of lawful interception, as all data is intercepted and no court orderwill be obtained for its interception as it is at least arguably an extralegal procedure.Fact|date=February 2007
Secrecy of correspondence
* [http://www.deccanherald.com/deccanherald/jan172006/panorama19352006116.asp Back when spies played by the rules] by
David Kahn, originally published in the New York Times- a history of black chambers
* [http://www.commondreams.org/headlines06/0517-10.htm AT&T Whistle-Blower's Evidence]
* [http://history-world.org/napoleon9.htm Discussion of cabinets noirs and Napoleon]
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