| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Outline of Final Research Achievements |
We have studied differential-phase-shift (DPS) quantum-key-distribution (QKD) related technologies. (1) “Intensity-modulated DPS-QKD” and “Measurement-device-independent DPS-QKD” have been proposed, which are modified to improve the system performance. (2) The DPS-QKD system performance considering phase fluctuation, that considering bit-error-rate fluctuation, and the robustness of DPS-QKD systems with power monitoring against blind attacks have been clarified, assuming practical situations. (3) “Intensity-modulation/direct-detection QKD” was proposed and evaluated, which features practicality employing apparatus used in conventional optical communication systems. (4) QKD systems multiplexing a quantum channel and a classical channel over one transmission fiber have been investigated, which is desirable in system implementation, where time-division-multiplexing and wavelength-division-multiplexing are assumed.
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