Abstract: Methods and apparatus for use in quantum key distribution (QKD) are described. A quantum QKD signal is generated at a source and transmitted through a fiber optic network to an endpoint, a key being agreed with communication over a classical QKD channel. The classical QKD channel contains additional information relevant to a network over which keys are distributed, and may be processed at nodes intermediate between the source and the endpoint.
Type:
Grant
Filed:
September 28, 2010
Date of Patent:
March 25, 2014
Assignee:
Qinetiq
Inventors:
Stephen Gerard Ayling, Simon Robert Wiseman, Brian Sinclair Lowans