Making a key advance . .

Knight, Helen
October 2004
Engineer (00137758);10/8/2004, Vol. 293 Issue 7661, p12
This article reports that Great Britain researchers have built the world's fastest quantum key distribution system, a major step in the move towards transmitting large amounts of unbreakable coded information. The system transmits encrypted information down standard telecom fibre, and the researchers ultimately hope to use it to send compressed video between two points with absolute security. This could allow it to be used in the defence and banking industries for sending sensitive video footage and for secure video conferencing. Quantum cryptography has the potential to provide verifiably secure data transmission, as it uses streams of single phctons so sensitive that unwanted observation by a third party causes errors in the code, which can then be detected by the users.


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