It starts off saying that it is unbreakable i.e the title, then a little way through goes onto say that its virtually impossible then towards the end it mention

It starts off saying that it is unbreakable i.e the title, then a little way through goes onto say that its virtually impossible then towards the end it mentions that the Americans 'probably' wont be able to break it. It sounds like its just a exaggerated title to get people to click :/ but the theory behind quantum encryption is amazing.