Your smartwatch tracks your heart rate and counts your calories. Your Ring camera lets you know when a package has been delivered. The GPS in your car smoothly directs you to a restaurant you've never been to before.

We've grown used to getting a technological assist for everything from finding our keys to checking where our children are at curfew. But the consumer electronics which can make our lives easier can also be used by the government to track and prosecute us–and Fourth Amendment protections haven't been keeping up.

Prof. Andrew Ferguson of George Washington University Law School has long been an advocate for digital privacy, and in his new book, Your Data Will Be Used Against You: Policing in the Age of Self-Surveillance, he hopes to kick off a movement to protect Americans from government intrusion.

In this episode of the Modern Law Library, Ferguson and host Lee Rawles talk about cases where people's device data wound up being used against them, how personal information is being sold by data brokers, and how the Wiretap Act could point the way forward for future data privacy protections. Ferguson also shares tips on how to sabotage your data and explains the Tyrant Test.