Voice assistants can be hacked by commanding them with inaudible ultrasonic speech

In DolphinAttack: Inaudible Voice Commands, researchers from Zhejiang University demonstrate an attack on popular voice assistants in laptops and mobile devices from Apple, Google, Amazon, Microsoft, Samsung, and Huawei: by commanding these assistants using speech that has been shifted to ultrasonic ranges, they are able to hijack devices in public places without their owners' knowledge. Read the rest