Using Diamonds to Create Unhackable Code

Researchers at Melbourne University have grown diamond particles 1/1000 of a millimetre on optical fibres which they can use to transmit single photons of light at a time. The diamonds are grown on the optical fibre by raining carbon molecules onto the tip of the fibre. They claim that by transmitting information in single photons, any interception of transmitted photons will be useless to the interceptor, and thus the message will be completely unhackable. Transmission speeds are currently slow — 120km/h — but are expected to speed up

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