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Ask Engadget: Can the police make me unlock my smartphone?

Know your rights.
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The support shared among readers in the comments section is one of the things we love most about the Engadget community. Over the years, we've known you to offer sage advice on everything from Chromecasts and cameras to drones and smartphones. In fact, our community's knowledge and insights are a reason why many of you participate in the comments.

We truly value the time and detail you all spend in responding to questions from your fellow tech-obsessed commenters, which is why we've decided to bring back our "Ask Engadget" column. This week's question concerns the legal side of technology. Weigh in with your advice in the comments -- and feel free to send your own questions along to ask@engadget.com!

What are my rights (as a US citizen) if the police ever ask me to unlock my phone?


Terrence O'Brien

Terrence O'Brien
Managing Editor

Although I'm not a lawyer, I was able to find some information courtesy of the ACLU and the EFF. (Note that this information pertains to US citizens specifically.)

If you're at the border, police are permitted to search your computer and portable devices, regardless of whether they have a warrant. Other times law enforcement doesn't need a warrant to search your phone: If you consent to a search, if they've asked a roommate or spouse for access to the device, or if you've just been arrested. If you're arrested, police are permitted to search your phone under limited circumstances but you're not required to turn over encryption keys or passwords.

The Supreme Court has ruled that police cannot search data on a cell phone unless they believe there is evidence on the phone that is likely to be destroyed. However, they can remove a case or battery. The Fifth Amendment, which protects citizens from being forced to give self-incriminating testimony, has generally been taken to extend to passwords or encryption keys. Law enforcement cannot threaten or force you into giving up a password or unlocking a phone or computer. (However, a judge or a grand jury may be able to compel you unlock devices.) The EFF recommends contacting them and seeking legal help if you find yourself in circumstances where law enforcement or someone in the justice system is pressing you to provide a password or encryption keys.

According to the ACLU, if an officer has asked for your phone while you're recording video or taking photographs or a protest or police activity, you are within your rights to refuse to comply, as the request is unlawful. Police officers "may not confiscate or demand to view your photographs or video without a warrant," and they are never permitted to delete any photographs or video off of your phone. Taking photographs and video in public is covered under your First Amendment rights, but there's still a chance you could be (unlawfully) arrested if you refuse to comply with the request.

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