The big picture: The Supreme Court has ruled in the past that you don’t have a “reasonable expectation of privacy” for data you voluntarily turn over to a third party.
- In the ’70s, it said police could use a pen register — a device that records all numbers called from a particular telephone line — to log the numbers a suspect dialed from his landline phone, because he knew he was routing those calls through the phone company. A similar case allowed warrantless searches of bank records.
- But here in 2017, almost everything we do involves transmitting data to a third party. As the ACLU put it in a brief to the high court, every day, millions of Americans disclose “their search queries to Google, their GPS coordinates and location history to Apple, Google, and Waze, their intimate photos to Apple or Flickr, and their medical queries to WebMD.”