PhysicsPhil writes: A few websites (here, here and here) have reported on a recent ruling in US computer law. A federal magistrate judge in Vermont has ruled (PDF) that the Fifth Amendment right against self-incrimination protects a suspect against having to reveal his computer password. The case centres around a (legal) search of a Canadian man's laptop at a border crossing, during which evidence of encrypted child pornography was found. A grand-jury instruction to disclose the password was challenged on Fifth Amendment grounds, leading to this ruling. A columnist at Findlaw.com has an article with legal analysis of some of the issues.