Professor Harald Haas of the University of Edinburgh demonstrates a device primarily a light bulb that could transmit data exactly that by flickering the light from a single LED, a change too quick for the human eye to detect, he can transmit far more data than a cellular tower — and do it in a way that’s more efficient, secure and widespread.
He also maintains that there are security benefits – light-generated internet connections do not travel through walls, so can not be intercepted like a wi-fi signal. The professor looks forward to a future where the much-hyped “internet of things” becomes a reality, where “there’s wireless connectivity everywhere, your fridge talks to your toaster – this provides the means to achieve that”.
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