The FBI has withdrawn a secret order that used new anti-terrorism powers to demand information about a user of the Internet Archive without a court order after attorneys challenged it as an unconstitutional abuse of power.

The victory for the San Francisco-based digital library meant that its founder was able to speak publicly about the sweeping demand, known as an NSL or national security letter, for the first time on Wednesday. Up until now, the demand for personal information about an undisclosed Internet Archive patron was protected by a gag order that prevented all but a handful of people from knowing it even existed.

Since the 9/11 attacks, the use of NSLs has proved a popular tool for getting information in government investigations if it is deemed relevant to terrorism or espionage. More than 200,000 of them were issued between 2003 and 2006, and yet, because of the secrecy surrounding them, only three have been known to have been challenged in court. Remarkably, all three challenges have succeeded.

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"The NSL basically allows the FBI to demand extremely sensitive personal information about innocent people without any prior court approval, often in total secrecy without any meaningful judicial review," Melissa Goodman, one of the attorneys representing the Internet Archive, said during a telephone conference with reporters. "It makes you wonder about the hundreds of thousands of other NSLs that have never been challenged and we know there are many."

The FBI withdrew the NSL after the American Civil Liberties Union and the Electronic Frontier Foundation, which represented the Internet Archive, filed a complaint (PDF) arguing that the Patriot Act statute that expanded the use of NSLs was unconstitutional.

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