Abstract
We optimize secret key rates (SKRs) of weak coherent pulse (WCP)-based quantum key distribution (QKD) over time-varying free-space optical channels affected by atmospheric turbulence. The random irradiance fluctuation due to scintillation degrades the SKR performance of WCP-based QKD, and to improve the SKR performance, we propose an adaptive scheme in which transmit power is changed in accordance with the channel state information. We first optimize BB84 and decoy state-based QKD protocols for different channel transmittances. We then present our adaptation method, to overcome scintillation effects, of changing the source intensity based on channel state predictions from a linear autoregressive model while ensuring the security against the eavesdropper. By simulation, we demonstrate that by making the source adaptive to the time-varying channel conditions, SKRs of WCP-based QKD can be improved up to over 20%.
| Original language | English (US) |
|---|---|
| Article number | 7470562 |
| Journal | IEEE Photonics Journal |
| Volume | 8 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jun 1 2016 |
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Keywords
- free-space optical communication
- Quantum key distribution
- source adaptation
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
Cite this
Secret Key Rates and Optimization of BB84 and Decoy State Protocols over Time-Varying Free-Space Optical Channels. / Sun, Xiaole; Djordjevic, Ivan B; Neifeld, Mark A.
In: IEEE Photonics Journal, Vol. 8, No. 3, 7470562, 01.06.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Secret Key Rates and Optimization of BB84 and Decoy State Protocols over Time-Varying Free-Space Optical Channels
AU - Sun, Xiaole
AU - Djordjevic, Ivan B
AU - Neifeld, Mark A
PY - 2016/6/1
Y1 - 2016/6/1
N2 - We optimize secret key rates (SKRs) of weak coherent pulse (WCP)-based quantum key distribution (QKD) over time-varying free-space optical channels affected by atmospheric turbulence. The random irradiance fluctuation due to scintillation degrades the SKR performance of WCP-based QKD, and to improve the SKR performance, we propose an adaptive scheme in which transmit power is changed in accordance with the channel state information. We first optimize BB84 and decoy state-based QKD protocols for different channel transmittances. We then present our adaptation method, to overcome scintillation effects, of changing the source intensity based on channel state predictions from a linear autoregressive model while ensuring the security against the eavesdropper. By simulation, we demonstrate that by making the source adaptive to the time-varying channel conditions, SKRs of WCP-based QKD can be improved up to over 20%.
AB - We optimize secret key rates (SKRs) of weak coherent pulse (WCP)-based quantum key distribution (QKD) over time-varying free-space optical channels affected by atmospheric turbulence. The random irradiance fluctuation due to scintillation degrades the SKR performance of WCP-based QKD, and to improve the SKR performance, we propose an adaptive scheme in which transmit power is changed in accordance with the channel state information. We first optimize BB84 and decoy state-based QKD protocols for different channel transmittances. We then present our adaptation method, to overcome scintillation effects, of changing the source intensity based on channel state predictions from a linear autoregressive model while ensuring the security against the eavesdropper. By simulation, we demonstrate that by making the source adaptive to the time-varying channel conditions, SKRs of WCP-based QKD can be improved up to over 20%.
KW - free-space optical communication
KW - Quantum key distribution
KW - source adaptation
UR - http://www.scopus.com/inward/record.url?scp=84974575252&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84974575252&partnerID=8YFLogxK
U2 - 10.1109/JPHOT.2016.2570000
DO - 10.1109/JPHOT.2016.2570000
M3 - Article
AN - SCOPUS:84974575252
VL - 8
JO - IEEE Photonics Journal
JF - IEEE Photonics Journal
SN - 1943-0655
IS - 3
M1 - 7470562
ER -