The Internet of Things is one of the fastest growing facets of a world that is becoming more data intensive. Connecting cars, appliances, and even clothing to the internet promises to deliver convenience, safety, and, through analysis of the torrent of additional data generated, potential solutions to some of our most intractable problems. But turning on this data flood also creates privacy and security risks for consumers, challenging us to consider how to apply basic privacy principles to the Internet of Things. A wide range of stakeholders—technologists, lawyers, industry leaders, and others—has a role to play in meeting this challenge.