Communication system and method for controlling the same

Details Communication system and method for controlling the same Communication system and method for controlling the same

2011-04-26

2011-04-26

Britt, Cynthia (Department: 2117)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Transmission facility testing

C714S707000, C375S224000, C370S242000

Reexamination Certificate

active

07934132

ABSTRACT:
For an error rate QBER, threshold values are preset, including a threshold value Qbitfor frame synchronization processing, a threshold value Qphasefor phase correction processing, and a threshold value QEvefor eavesdropping detection. Upon the distribution of a quantum key from a sender to a receiver, when the measurement value of QBER is deteriorated more than Qbit, frame synchronization processing is performed. When the measurement value of QBER is deteriorated more than Qphase, phase correction processing and frame synchronization processing are performed. When QBER does not become better than QEveeven after these recovery-processing steps are repeated N times, it is determined that there is a possibility of eavesdropping, and the processing is stopped.

REFERENCES:
patent: 6266377 (2001-07-01), Velez et al.
patent: 6915127 (2005-07-01), Sakuma
patent: 7349545 (2008-03-01), Kim
patent: 7522835 (2009-04-01), Guertin et al.
patent: 2001/0038695 (2001-11-01), Kim
patent: 2003/0224777 (2003-12-01), Sakuma
patent: 2004/0190725 (2004-09-01), Yuan et al.
patent: 2005/0078827 (2005-04-01), Tajima
patent: 2006-352373 (2006-12-01), None
Fertner, A.; Solve, C.; , “Symbol-rate timing recovery comprising the optimum signal-to-noise ratio in a digital subscriber loop,” Communications, IEEE Transactions on , vol. 45, No. 8, pp. 925-936, Aug. 1997 doi: 10.1109/26.618296.
Younggyun Kim; Jaekyun Moon; , “Phase error compensation for improved timing recovery,” Magnetics, IEEE Transactions on , vol. 36, No. 5, pp. 2190-2192, Sep. 2000 doi: 10.1109/20.908353.
Tanaka et al. “Temperature independent OKD system using alternative-shifted phase modulation method”.
Lutkenhaus “Estimates for practical quantum cryptography” The American Physical Society, vol. 59, No. 5; May 1999.
Willamson et al. “Eavesdropping on pratical quantum cryptography” Jul. 8, 2004; pp. 1-13.
Tomita et al. “Balanced, gated-mode photon detector for quantum-bit discrimination at 1550 nm” Optics Letters, vol. 27, No. 20; Oct. 15, 2002.
Maeda et al. High-speed QKD : system synchronized by automatic phase-alignment mechanism.
Bennett et al. “Quantum Cryptography: Public key distribution and coin tossing” pp. 175-179 International Conference on Computers; Dec. 10-12, 1984.
Ribordy et al. “Automated ‘plug & play’ quantum key distribution” Electronic Letters, vol. 34, No. 22; Oct. 29, 1998.
European Search Report dated Sep. 26, 2006.
Japanese Office Action dated Jan. 13, 2011.

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