appearances matter move to switzerland

The majority view, followed by multiple federal circuits, is that the prosecution can't make you decrypt things using a password you know but can make you decrypt things using your fingerprint or other biometrics.

The minority view, followed by some state supreme courts, is that the prosecution can make you decrypt things using a password you know and also can make you decrypt using biometrics.

People have been in prison for contempt of court for years before legal aid organizations appealed their cases high enough to get the contempt order overturned and thereby to establish the majority view. And, the majority view is still not universal, especially at the state level.

Using a TrueCrypt hidden volume would definitely make someone's contempt case more clear-cut: you are holding me in contempt for not producing something that there is a very good chance may not even exist.