I have a number of smart home devices in my house. Some of which are a Samsung refrigerator, a Whirlpool washer, a Bose Bluetooth speaker with wifi and a Roku TV all of which I assume have microphones.
What would be the best way at securing these devices from being hacked and listened in on short of completely dismantling said devices and disconnecting the microphone?
In Android, there are settings to change the permissions of the microphone. However, I am assuming an attacker who has compromised a device would be able to change these permissions? Do smart home devices normally have more then one microphone?
IN RESPONSE TO ANSWERS: Well if these devices were comprimised, then it would be safe to say that the router is most likely compramised as well wouldnt it, and any firewall that is used would not be effective? If smart home devices have connection to the internet, would you be able to SSH into the device and change default passwords, assuming they were not compramised. Would you also be able to disable the microphone in a way that it would be very difficult to re-enable? For this entire question we will just assume nothing is comprimised and other then setting a firewall to stop the transfer of data are there other methods that can be taken to devices individually?