http://news.cnet.com/8301-31921_3-57364330-281/judge-americans-can-be-forced-to-decrypt-their-laptops/

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American citizens can be ordered to decrypt their PGP-scrambled hard drives for police to peruse for incriminating files, a federal judge in Colorado ruled today in what could become a precedent-setting case.

Judge Robert Blackburn ordered a Peyton, Colo., woman to decrypt the hard drive of a Toshiba laptop computer no later than February 21--or face the consequences including contempt of court."

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Blackburn, a George W. Bush appointee, ruled that the Fifth Amendment posed no barrier to his decryption order. The Fifth Amendment says that nobody may be "compelled in any criminal case to be a witness against himself," which has become known as the right to avoid self-incrimination.

"I find and conclude that the Fifth Amendment is not implicated by requiring production of the unencrypted contents of the Toshiba Satellite M305 laptop computer," Blackburn wrote in a 10-page opinion today. He said the All Writs Act, which dates back to 1789 and has been used to require telephone companies to aid in surveillance, could be invoked in forcing decryption of hard drives as well."

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While the U.S. Supreme Court has not confronted the topic, a handful of lower courts have.

In March 2010, a federal judge in Michigan ruled that Thomas Kirschner, facing charges of receiving child pornography, would not have to give up his password. That's "protecting his invocation of his Fifth Amendment privilege against compelled self-incrimination," the court ruled (PDF).

A year earlier, a Vermont federal judge concluded that Sebastien Boucher, who a border guard claims had child porn on his Alienware laptop, did not have a Fifth Amendment right to keep the files encrypted. Boucher eventually complied and was convicted."