Title :
Unconditionally secure quantum key distribution over 50 km of standard telecom fibre
Author :
Gobby, C. ; Yuan, Z.L. ; Shields, A.J.
Author_Institution :
Cambridge Res. Lab., Toshiba Res. Eur. Ltd., Cambridge, UK
Abstract :
A weak pulse quantum key distribution system is presented, which is secure against all individual attacks, including photon number splitting. By carefully controlling the weak pulse intensity the maximum secure bit rate as a function of the fibre length is demonstrated. Unconditionally secure keys can be formed for standard telecom fibres exceeding 50 km in length.
Keywords :
optical fibre communication; quantum cryptography; telecommunication security; 50 km; fibre length; maximum secure bit rate; photon number splitting; secure quantum key distribution; standard telecom fibre; weak pulse quantum key distribution system;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20045038
