Design and Security Analysis of Quantum Key Distribution Protocol Over Free-Space Optics Using Dual-Threshold Direct-Detection Receiver

Trinh, Phuc V.; Pham, Thanh V.; Dang, Ngoc T.; Nguyen, Hung Viet; Ng, Soon Xin; Pham, Anh T.

doi:10.1109/access.2018.2800291

Cited by 49 publications

(39 citation statements)

References 41 publications

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“…In this section, we briefly repeat the operation overview of the recently proposed QKD protocol over free-space channels using SIM/BPSK signaling and D-T direct detection 8 . The operation steps are as follows.…”

Section: System Operationmentioning

confidence: 99%

“…Figure 2. A block diagram of the considered free-space CV-QKD system using SIM/BPSK with a D-T receiver 8 . Figure 2 represents a block diagram of the considered free-space QKD system.…”

Section: Security Constraintsmentioning

confidence: 99%

“…Figure 2 represents a block diagram of the considered free-space QKD system. The system model is analyzed as follows 8 . At the transmitter, the source data d(t) is modulated onto a radio frequency subcarrier signal using BPSK scheme in which bits "0" and "1" are represented by two different phases 180 o apart.…”

Section: Security Constraintsmentioning

confidence: 99%

“…To avoid such issue, differential-phase-shift-keying (DPSK)based CV-QKD using a delay interferometer was developed 3 . To further simplify CV-QKD configurations, intensity modulation/direct detection (IM/DD) CV-QKD systems have been recently proposed for implementation over both *pvtrinh@nict.go.jp; phone +81-42-327-5982; fax +81-42-327-6825; www.nict.go.jp optical fiber 4,5 and free-space optics (FSO) 6,7,8 . IM/DD systems do not require a delay interferometer and have been welldeveloped in standard optical communications.…”

Section: Introductionmentioning

confidence: 99%

“…QKD over FSO, or free-space QKD, plays an important role in bridging the gap to an eventual global quantum network as FSO platforms are highly secure and flexible, providing a wide range of applications for terrestrial, airborne, and satellite-based networks 9 . This paper further explores the secrecy performance of the recently proposed IM/DD freespace CV-QKD using subcarrier intensity modulation (SIM) binary phase shift keying (BPSK) with dual-threshold (D-T) avalanche photodiode (APD)-based receiver 8 , under realistic terrestrial transmission environments including atmospheric turbulence-and legitimate transceivers' misalignment-induced fading channels. The atmospheric turbulence due to variations in the refractive index along the propagation path, which cause random temporal and spatial irradiance fluctuation in the optical beam, is modeled by a log-normal distribution.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effects of atmospheric turbulence and misalignment-induced fading on the secrecy performance of IM/DD free-space CV-QKD systems using a Gaussian beam

Trinh

Carrasco‐Casado

Pham

et al. 2019

International Conference on Space Optics — ICSO 2018

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This paper explores the secrecy performance of the recently proposed intensity modulation/direct detection (IM/DD) terrestrial free-space quantum key distribution (QKD) system, by using a Gaussian-beam propagation model and considering the combined effects of atmospheric turbulence and legitimate transceivers' misalignment. Secrecy performance metrics including quantum bit error rate (QBER) and ergodic secret-key rate are newly derived in closedform expressions, taking into account all combined effects of turbulence-and misalignment-induced fading channels, the eavesdropper's location relative to the legitimate receiver, and receiver noises. To satisfy security constraints, the system designs based on the intensity modulation depth and beam waist of the Gaussian beam at the transmitter, and dualthreshold (D-T) selection at the receiver, are comprehensively discussed under turbulence and misalignment conditions as well as different eavesdropper's locations. Monte-Carlo (M-C) simulations are also implemented to verify the analytical results. Remarkably, this paper also offers the first framework in the literature to evaluate the secrecy performance of free-space optical (FSO) systems considering the eavesdropper's location under the effect of misalignment between legitimate transceivers.

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Section: System Operationmentioning

confidence: 99%

“…Figure 2. A block diagram of the considered free-space CV-QKD system using SIM/BPSK with a D-T receiver 8 . Figure 2 represents a block diagram of the considered free-space QKD system.…”

Section: Security Constraintsmentioning

confidence: 99%

Section: Security Constraintsmentioning

confidence: 99%