(IMAGE) Université de Genève Caption Using these sensors, scientists were able to generate a secret key at a rate of 64 megabits per second over 10 km of fibre optic cable. Credit © M. Perrenoud - G. Resta / UNIGE Usage Restrictions none License Original 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.