Prototype Quantum Key Distribution Device (IMAGE) The Optical Society Caption This handheld device for transmitting and receiving quantum cryptographic keys was built from off-the-shelf components. The device could be miniaturized for use in a mobile device. Credit Iris Choi, Oxford University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.