Most countries don't have protections against self-incrimination. UK is one of them. You can get up to 2 years for refusing to provide a password. The 5th Amendment is an awesomely antiquated tool, in that, unlike ECPA, it provides more protection than modern government and LE would allow. Let's face it, if the US constitution were written from scratch, there would be no 4th and 5th Amendments. But we have it, and the lower courts have gone about 50-50 so far on the issue of whether providing a password is self-incriminating. I believe it will go to the Supreme Court at some point. Hopefully we'll win.