University of Oxford spin-out company, Quantum Dice, is developing its innovative self-certifying quantum random number generating device that uses light to create completely unpredictable, unrepeatable encryption keys. The intellectual property that Quantum Dice is based upon emanated from the Department of Physics and the patented system works by shining a laser at a beam splitter.  The photons can either go straight through or be bent at a right angle and, when collected together, this creates a stream of numbers that is, by the laws of physics, completely random and so a third party, no matter how sophisticated, can never predict the output randomness.