Success in distributing single photons for quantum cryptography via an optical switch

Success in distributing single photons for quantum cryptography via an optical switch

Application of single photon interference phenomena that had annoyed Prof. Einstein

Nippon Telegraph and Telephone Corp. has successfully demonstrated the quantum cryptography with a single photon, whose state is so fragile against the attacks from the eavesdroppers, can be realized in the photonic network of optical fibers. This result was enabled by combining the original protocol of the quantum cryptography developed by the collaboration of NTT and Stanford University (USA) and the NTT developed optical switch to control the flow of photons. The quantum cryptography is expected to be the last resort of the cryptography protocol, and to enhance enormously the safety of the transmitting information.

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<a href="http://www.physorg.com/news4536.html">Success in distributing single photons for quantum cryptography via an optical switch</a> Application of single photon interference phenomena that had annoyed Prof. Einstein Nippon Telegraph and Telephone Corp. has successfully demonstrated the quantum cryptography with a single photon, whose state is so fragile against the attacks from the eavesdroppers, can be realized in the photonic network of optical fibers. This result was enabled by combining the original protocol of the quantum cryptography developed by the collaboration of NTT and Stanford University (USA) and the NTT developed optical switch to control the flow of photons. The quantum cryptography is expected to be the last resort of the cryptography protocol, and to enhance enormously the safety of the transmitting information.