University of Melbourne's Quantum Communications Victoria (QCV) has developed diamond tipped optical fibres, that can emit single photons. And they won the "Secrets of Australian ICT Innovation" Award for this: http://qcvictoria.com/news_and_events/qcv_wins_nation_wide_innovation_competition
"QCV's device is expected to greatly improve the performance of existing commercial quantum cryptosystems by using planned defects in a diamond crystal to produce single photons of light. Diamond has been chosen as it is the only material capable of delivering single photons reliably at room-temperature over a prolonged time, researchers say." Read more at: http://www.computerworld.com.au/index.php/id;503498833;fp;2;fpid;1 Why are multi-photon pulses such a problem in QKD? The eavesdropper can split the multi-photon pulse, measuring one photon and letting the other one go. Thus the eavesdropper can determine part of the key. Even more, the attacker can stop all single photon pulses, and allow only multi-photon pulses, thus gaining access to the whole key. _______________________________________________ FDE mailing list [email protected] http://www.xml-dev.com/mailman/listinfo/fde
