Title:
【発明の名称】量子暗号法
Document Type and Number:
Japanese Patent JPH10504694
Kind Code:
A
Abstract:
In a method of communication using quantum cryptography, single-photon signals from a highly attenuated source are modulated and subsequently detected. In the step of detecting the modulated signal, the signal is split between two branches according to its encoded state. Signals corresponding to different encoded states are detected independently in the respective branches and the rate of detection of coincident signals is determined. This rate is compared with a threshold to detect the presence of an eavesdropper.
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Inventors:
Townsend, Paul David
Application Number:
JP50785496A
Publication Date:
May 06, 1998
Filing Date:
August 16, 1995
Export Citation:
Assignee:
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
International Classes:
H04L9/08; H04B10/00; H04B10/079; H04B10/70; H04L9/12; H04L9/38; G02F1/141; (IPC1-7): H04L9/38; H04B10/00; H04L9/08
Attorney, Agent or Firm:
Takehiko Suzue (4 outside)