Quantum monitored long-distance secure optical network

Gong, Yupeng; Kumar, Rupesh; Wonfor, A.; Penty, R.V.; White, I.H.

doi:10.1364/cleo_at.2018.jth2a.23

Cited by 3 publications

(2 citation statements)

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“…To conclude, this paper reports the demonstration of simultaneous quantum and classical data transfer on a single signal. This technique enables direct monitoring of eavesdropping on classical communications where classical signals are combined with quantum signals using DSG 22 which may have a strong commercial interest as it provides physical layer security using standard telecommunication equipment. Especially using 10G/100G classical coherent communication systems where one can fairly estimate channel parameters of CV-QKD but it is hard to generate secure key due to poor performance of error correction and privacy amplification at high data rate 15 .…”

Section: Resultsmentioning

confidence: 99%

Experimental demonstration of single-shot quantum and classical signal transmission on single wavelength optical pulse

Kumar

Wonfor

Penty

et al. 2019

Sci Rep

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Advances in highly sensitive detection techniques for classical coherent communication systems have reduced the received signal power requirements to a few photons per bit. At this level one can take advantage of the quantum noise to create secure communication, using continuous variable quantum key distribution (CV-QKD). In this work therefore we embed CV-QKD signals within classical signals and transmit classical data and secure keys simultaneously over 25 km of optical fibre. This is achieved by using a novel coherent displacement state generator, which has the potential for being used in a wide range of quantum optical experiments. This approach removes the need for separate channels for quantum communication systems and allows reduced system bandwidth for a given communications specification. This demonstration therefore demonstrates a way of implementing direct quantum physical layer security within a conventional classical communications system, offering a major advance in term of practical and low cost implementation.

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Section: Resultsmentioning

confidence: 99%

Experimental demonstration of single-shot quantum and classical signal transmission on single wavelength optical pulse

Kumar

Wonfor

Penty

et al. 2019

Sci Rep

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“…This indicates that quantum physics can also provide physical layer security to a classical communication channel. In this paper, we experimentally demonstrate a quantum alarm (QA) monitoring system [4] which can provide in service surveillance of an optical network.…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of in-service security monitoring using a quantum modulated signal

Gong

Yang

Hunt

et al. 2020

Conference on Lasers and Electro-Optics

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Experimental demonstration of confidential communication with quantum security monitoring

Gong

Wonfor

Hunt

et al. 2021

Sci Rep

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Security issues and attack management of optical communication have come increasingly important. Quantum techniques are explored to secure or protect classical communication. In this paper, we present a method for in-service optical physical layer security monitoring that has vacuum-noise level sensitivity without classical security loopholes. This quantum-based method of eavesdropping detection, similar to that used in conventional pilot tone systems, is achieved by sending quantum signals, here comprised of continuous variable quantum states, i.e. weak coherent states modulated at the quantum level. An experimental demonstration of attack detection using the technique was presented for an ideal fibre tapping attack that taps 1% of the ongoing light in a 10 dB channel, and also an ideal correlated jamming attack in the same channel that maintains the light power with excess noise increased by 0.5 shot noise unit. The quantum monitoring system monitors suspicious changes in the quantum signal with the help of advanced data processing algorithms. In addition, unlike the CV-QKD system which is very sensitive to channel excess noise and receiver system noise, the quantum monitoring is potentially more compatible with current optical infrastructure, as it lowers the system requirements and potentially allows much higher classical data rate communication with links length up to 100 s km.

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Quantum monitored long-distance secure optical network

Cited by 3 publications

References 0 publications

Experimental demonstration of single-shot quantum and classical signal transmission on single wavelength optical pulse

Experimental demonstration of single-shot quantum and classical signal transmission on single wavelength optical pulse

Experimental demonstration of in-service security monitoring using a quantum modulated signal

Experimental demonstration of confidential communication with quantum security monitoring

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