[cmpb]

In the US that would be a (search?) warrant which also comes from the judge during a police investigation and authorizes the police to get your phone's passcode under threat of prison time.

This particular case is different because the police did not get a warrant and instead just asked the guy to disclose (without a warrant), which he refused to do, then they tried to use that against the guy in court, which is a violation of the US constitution.

[colinmhayes]

Only some states have ruled that the state can force you to reveal your password. Others have ruled that the 5th amendment protects you and your passwords.

[thehappypm]

No, a search warrant does not mean you need to hand over passwords.

[nerdponx]

How does this work with physical things, like a safe locked with a passcode, or a closet locked with a key?

[colonwqbang]

They'll just break it open if you won't do it for them?