Comment Re:Sanity... (Score 1) 504
They can't literally make you tell them what they want to know, but they absolutely can punish you for refusing to comply with a subpoena, unless the testimony would require you to incriminate yourself, which the disclosure of a password does not if the fact that you possess relevant, incriminating information is a foregone conclusion. That was the decision in Boucher, from your own link.
Several courts have ruled contrary to this in the last two years, but these have only been in cases where investigators didn't know what they were looking for and simply wanted the passwords on general principles. The more general the search was, the more self-incriminating disclose of passwords became, and thus unconstitutional; and contrarily, if the government can show that you received incriminating information or it's obvious or reasonable that specific, incriminating information exists on your media, they can subpoena you to decrypt it.