[wlug] Hacking Voice Assistant Systems With Inaudible Voice Commands

Turns out that all the major voice assistants -- Siri, Google Now, Samsung S Voice, Huawei HiVoice, Cortana and Alexa -- listen at audio frequencies the human ear can't hear. Which means somebody could send commands to your device that you have no idea about. <https://www.schneier.com/blog/archives/2017/09/hacking_voice_a.html>