The right to not self-incriminate is very limited. Historically if it is a foregone conclusion that you have contraband hidden or locked away then you can be c

The right to not self-incriminate is very limited. Historically if it is a foregone conclusion that you have contraband hidden or locked away then you can be coerced by the courts to reveal the location and/or furnish the key to unlock it. The theory is that handing over a key is not testifying. Therefore neither is providing your biometrics testifying either, and possibly even revealing your passcodes would be testifying either.