We live in an age where the voice can be processed locally on the phone (we’ve had on-device speech-to-text since the late 90s…), and it’s already listening for a wake word, meaning mic is always hot. It doesn’t need to be streamed and use bandwidth; it can fire off 4K of JSON every few hours and relay more than enough information.

Just program whole dictionary of key phrases and scan the wake word buffer like you are already doing. Easy, stealthy, encrypted. Every voice assistant from a major tech company could (and likely IS) doing this.

This also provides ample opportunity for domestic (or even foreign!) spying my state actors, too.