Laser (IMAGE) Karlsruher Institut für Technologie (KIT) Caption As Data may be transferred via light, security critical systems need optical protection. (Photo: Andrea Fabry, KIT) Credit Photo: Andrea Fabry, KIT Usage Restrictions . 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.