milsoRgen writes: "One of the adages of computing is that no hardware is safe when someone has physical access to the machine. In an age of booming laptop sales, people haven't found that reassuring and have frequently turned to disk encryption in an effort to protect their personal data. A new paper (PDF) by a group of Princeton computer scientists suggests that disk encryption is vulnerable to a hack that will be hard to correct for: data about the encryption can be extracted from the machine's RAM."
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