[ZeroCoin]

>The first question is whether the government can lawfully compel the telephone’s owner to divulge the passcode. I believe the answer is that yes, a person can in fact face punishment for refusal to enter in the password to decrypt his own phone. If the government obtains a subpoena ordering the person to enter in the passcode, and the person refuses or falsely claims not to know the passcode, a person can be held in contempt for failure to comply.

I thought the exact opposite was true?

That no judge or any court can force you to disclose your password?

ie self incriminating your own person.

Apparently it varies from country to country: http://en.wikipedia.org/wiki/Key_disclosure_law