A criminal suspect can’t be forced to divulge their phone passcode, a US circuit court judge ruled in October 2014. Yet law enforcement officials can compel a suspect to provide a fingerprint – which they can then use to unlock the phone and obtain data which may prove the case against them.

In an ongoing Canadian civil case, activity data from a Fitbit fitness band is being used to determine the truthfulness of an accident victim’s claim that she is less active now than before the accident.

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