Privacy and IoT: What Your Smart Devices Know About You
Smart devices collect more data than most people realize. Understand what is being gathered, who sees it, and how to protect your household privacy.
Every smart device in your home is a data collection point. That is not inherently sinister — devices need data to function. Your smart thermostat must know your schedule to save energy, and your voice assistant must process audio to respond to commands. But the scope of data collection often extends far beyond what is necessary for basic functionality, and most consumers have no idea how much information their devices are gathering or where it ends up.
What Different Devices Collect
Voice Assistants
Amazon Echo, Google Nest, and Apple HomePod devices listen for wake words continuously. When triggered, they record and transmit your voice command to cloud servers for processing. Amazon and Google store these recordings by default and use them to improve their speech recognition systems. Some employees at these companies have access to anonymized recordings for quality review. Apple processes most Siri requests on-device and does not retain recordings by default.
Smart Cameras and Doorbells
Video doorbells and security cameras with cloud storage plans upload footage to company servers. Ring, for example, has faced scrutiny for partnerships with law enforcement that allowed police to request footage from users without a warrant. Even without such partnerships, cloud-stored video is subject to the provider's data retention policies and potentially accessible through legal requests.
Smart TVs
Most smart TVs employ automatic content recognition technology that tracks what you watch — not just through the TV's built-in apps, but anything displayed on screen, including cable boxes, game consoles, and Blu-ray players. This viewing data is used for targeted advertising and sold to data brokers.
Robot Vacuums
Modern robot vacuums create detailed maps of your home's interior layout, including room sizes, furniture placement, and floor plans. iRobot faced significant backlash when it was revealed that some test units had captured and transmitted images from inside users' homes during development of visual navigation features.
Steps You Can Take Today
- Audit your device settings — most smart devices have privacy options buried in their apps. Disable features you do not need, like voice recording storage or usage analytics sharing.
- Use local processing when available — devices that process data on-device rather than in the cloud inherently expose less information. Apple HomeKit, Home Assistant, and Matter-based setups prioritize local control.
- Segment your network — place IoT devices on a separate Wi-Fi network or VLAN from your computers and phones. This limits what a compromised smart device can access on your network.
- Review and delete stored data regularly — both Amazon and Google provide tools to review and delete stored voice recordings. Use them periodically.
- Read the privacy policy before buying — if a company's privacy policy states they can sell or share your data with third parties, consider whether a competitor offers better terms.
The goal is not to avoid smart home technology entirely but to make informed choices about which trade-offs you are comfortable with. A smart thermostat that saves you $150 a year on heating while sharing your schedule data with advertisers may or may not be worth it to you — but you should know the deal before you agree to it.
As regulation catches up with technology, consumers who understand what their devices collect will be better positioned to demand and recognize meaningful privacy protections when they arrive.