I am not a lawyer either, but generally you can be compelled to reveal a password. It is generally seen as analogous to the combination to a safe or a key to a

I am not a lawyer either, but generally you can be compelled to reveal a password. It is generally seen as analogous to the combination to a safe or a key to a door. Compelling revelation of the password is not generally seen as a violation of the Fifth ammendment. While a ruling from a lower court, there is a good discussion of this at IN RE JURY SUBPOENA TO SEBASTIEN BOUCHER, Dist. Court, D. Vermont 2009 (which is available on Google Scholar)