Project Alias
Through a simple app the user can train Alias to react on a custom wake-word/sound, and once trained, Alias can take control over your home assistant by activating it for you.
(...) When you don’t use it, Alias will make sure the assistant is paralysed and unable to listen by interrupting its microphones.
https://raw.githubusercontent.com/bjoernkarmann/project_alias/master/imgs/alias.jpg 
https://raw.githubusercontent.com/bjoernkarmann/project_alias/master/imgs/short_alias_explained.gif ▻http://bjoernkarmann.dk/project_alias
(The training of the parasite is done locally, no cloud involved)
