Differential-phase-shift quantum key distribution with phase modulation to combat sequential attacks

Journal Article · Tue Nov 15 04:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.052311· OSTI ID:22093480

Kawahara, Hiroki; Oka, Toru; Inoue, Kyo ^[1]

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1. Osaka University, Osaka 565-0871 (Japan)

Phase-modulated differential-phase-shift (DPS) quantum key distribution (QKD) is presented for combating sequential attacks that most severely restrict the DPS-QKD system distance. Slow phase modulation imposed onto the DPS signal obstructs the optimum unambiguous state discrimination measurement conducted in the sequential attack and improves the QKD distance as a result. The condition with which the phase modulation does not degrade the DPS-QKD system performance is also described.

• OSTI ID: 22093480
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTANCE
MODULATION
PERFORMANCE
PHASE SHIFT
QUANTUM MECHANICS
QUANTUM STATES