We're certainly compelled to have evidence collected from our stuff. You aren't compelled to say where to look, but you are compelled to let them look. Unlock

We're certainly compelled to have evidence collected from our stuff. You aren't compelled to say where to look, but you are compelled to let them look. Unlock this computer vs tell me your password. The password could contain "I did the murder and I buried the body under the bus stop" which is clearly testimony, but unlocking and changing the password to something the government asks you to seems well within range