Wikipedia defines IoT as physical objects (or groups of such objects) with sensors, processing ability, software, and other technologies that connect and exchange data with other devices and systems over the Internet or other communications networks.
With all of these objects or things more data is freely flowing across homes, coffee shops, neighborhood networks, work places, planes, trains, cars, and much more.
Most of these devices record and/or transmit private and personal data.
Most of these devices can be hacked and the data retrieved – sometimes more than you wish.
What do you know about IoT?
If you are new to IoT, this is a good read Ultimate IoT implementation Guide
You still need them for IoT devices.
Keep your data safe… and secure!