For years, police departments have had access to powerful technology that can mimic cellphone towers and allow officers to track suspects’ calls and text messages, often scooping up massive amounts of mobile data in the process.

Now, federal and state lawmakers are moving to put tighter restrictions on when and how police can use these powerful tools commonly referred to as Stingrays, which digital rights groups and privacy advocates have long complained can lead to indiscriminate surveillance.

Read the rest of this article at The Christian Science Monitor …

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