You can’t be compelled to hand over your PIN or passwords at the U.S. border, according to Nathan Freed Wessler, staff attorney for the ACLU’s Speech, Privacy and Technology Project, but depending on your status, there could be consequences for refusing to divulge them. U.S. citizens and green card holders can be detained, and border agents can hold their devices, while visa-holders can be denied entry to the U.S. if they refuse to give their PIN or password.

https://news.vice.com/story/how-to-secure-your-phone-when-crossing-the-border?utm_source=dmfb