Device-compatible ultra-high-order quantum noise stream cipher based on delta-sigma modulator and optical chaos

Hanwen Luo; Ziheng Zhang; Longquan Dai; Linsheng Zhong; Qi Yang; Lei Deng; Deming Liu; Xiaoxiao Dai; Xiaojing Gao; Mengfan Cheng

doi:10.1038/s44172-024-00171-x

Communications Engineering (Feb 2024)

Device-compatible ultra-high-order quantum noise stream cipher based on delta-sigma modulator and optical chaos

Hanwen Luo,
Ziheng Zhang,
Longquan Dai,
Linsheng Zhong,
Qi Yang,
Lei Deng,
Deming Liu,
Xiaoxiao Dai,
Xiaojing Gao,
Mengfan Cheng

Affiliations

Hanwen Luo: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)
Ziheng Zhang: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)
Longquan Dai: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)
Linsheng Zhong: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)
Qi Yang: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)
Lei Deng: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)
Deming Liu: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)
Xiaoxiao Dai: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)
Xiaojing Gao: The School of Computer Science, China University of Geosciences
Mengfan Cheng: National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST)

DOI: https://doi.org/10.1038/s44172-024-00171-x
Journal volume & issue: Vol. 3, no. 1
pp. 1 – 10

Abstract

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Abstract Data security is a key feature of future communications networks. Physical layer introduces rich physical mechanisms to increase the complexity of deciphering and provides extensive protection, but faces challenges in compatibility with commercial systems. Quantum noise stream cipher (QNSC) has been proposed as a promising solution to overcome this problem by fusing the stream cryptography regime with the quantum noise masking physical mechanism. However, it has limitations in terms of digital to analog conversion and clock data synchronization of ultra-high-order ciphertext as well as flexible control of masking noise. Here we report a 147.9-Gbps device-compatible quadrature amplitude modulation (QAM) QNSC secure scheme over 75-km fiber. Thanks to delta-sigma modulator, the transmission of 220 × 220-order QAM-QNSC signal are established through the low-order digital signal. We develop a theoretical model for flexibly regulating the transmission rate and security performance. Broadband optical chaos introduces true randomness and acts on the masking noise.

Published in Communications Engineering

ISSN: 2731-3395 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: https://www.nature.com/commseng/

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