There's United States v. Boucher but case had a couple of wrinkles, including the fact that Boucher had previously cooperated with law enforcement so it was tho

There's United States v. Boucher but case had a couple of wrinkles, including the fact that Boucher had previously cooperated with law enforcement so it was thought that providing a password wasn't self-imcrimination since it wouldn't add to the knowledge of what the authorities already had: http://en.wikipedia.org/wiki/United_States_v._Boucher http://en.wikipedia.org/wiki/United_States_v._Boucher