Quantum Repeater - Top Secret Messages Over Long Distances
Monday, October 25, 2010 - 10:30
in Physics & Chemistry
Quantum cryptography is the technology of the future for military and financial organizations because it sends information as entangled particles of light - anyone who tries to tap into the information changes it in a way that reveals their presence. The data is encoded with an encrypted key but one important limitation is range. The longest distance over which an encrypted key can be sent is approximately 100 kilometers but new technology developed by researchers increases 30-fold the amount of time the memory can hold information, which means that a series of quantum repeaters, arrayed like Christmas lights on a string, could reach distances in excess of 1,000 kilometers. read more