VUI (voice user interface) is a device that on command using human voice to communicate. Another word for this is intelligent voice agent or voice assistance.
Technology has increased the confidence factor in understanding the intent of the request from the speaker. Programs have been built to weed out the ‘ums and hums’ from the dictation. Eliminating the unnecessary words from the speaker. allowing people to speak naturally in a comfortable conversation of setting with technology.
Like any other data, there is a security factor to be aware of. The devices are always on and listening which can allow for hackers to listen in. Also data is passing thru the servers the input and output from questions asked and information given. The device is active when a wake word is used. (For example, Alexa is mostly used as the wake word for the Echo device.)
You can reference the criminal case with evidence from Amazon echo.
To date Amazon has not released any access of anyone’s echo to the government. Amazon currently reports it only stores the data access by its cloud-based storage system. However in theory a government agency could request to listen in even before you use the wake work. A warrant is necessary by a federal judge to access this information, same as phone records and email. Although the Net Neutrality laws will give permission for providers to sell access history, making it accessible in aggregate information.