Integration of Self-Adaptive Physical-Layer Key Distribution and Encryption in Optical Coherent Communication
Artikel i vetenskaplig tidskrift, 2023

We propose and experimentally demonstrate a compatible physical-layer secure optical communication (PLSOC) system that integrates self-adaptive physical-layer key distribution (PLKD) and encryption (PLE) in optical coherent communication. Based on bit error rate difference of QAM signals mapped by asymmetric basis state Y-00 protocol, the secret key can be secretly exchanged over public fiber links without the pre-shared keys. Moreover, we perform a parameter self-adaptive strategy for practical and dynamic PLKD. The security of the key is evaluated in the case of a fiber-tapping attack. A secure hash algorithm, SHA3-512, is used to perform privacy amplification to obtain the virtually secure key. An error-free PLKD rate reaches 39.3 Kbits/s over 300km ultra-low loss fiber. We experimentally enable the integration of the proposed PLKD scheme and quantum noise stream cipher (QNSC) with a single wavelength, same system. Q factor penalty of the integration system compared to the QNSC system is 3.7dB (optical back-to-back) and 4.8dB (300km) respectively. By exploiting a common hardware platform, with the same wavelength, the proposed PLSOC system addresses the problem that PLKD and PLE are separately performed through independent optical fiber links or wavelengths. Since only digital signal processing is used, the scheme does not require extra hardware.

quantum noise stream cipher

Y-00 protocol

Quadrature amplitude modulation

Optical signal processing

Adaptive optics

physical-layer encryption

physical-layer secure optical communication

Optical polarization

physical-layer key distribution

Optical fiber communication

Optical fibers

Protocols

Författare

Lei Chao

Beijing University of Posts and Telecommunications (BUPT)

Rui Lin

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Yajie Li

Beijing University of Posts and Telecommunications (BUPT)

Bo Wang

Beijing University of Posts and Telecommunications (BUPT)

Mingrui Zhang

Beijing University of Posts and Telecommunications (BUPT)

Yongli Zhao

Beijing University of Posts and Telecommunications (BUPT)

Jie Zhang

Beijing University of Posts and Telecommunications (BUPT)

Journal of Lightwave Technology

0733-8724 (ISSN) 1558-2213 (eISSN)

Vol. 41 17 5599-5606

Ämneskategorier

Telekommunikation

Atom- och molekylfysik och optik

Kommunikationssystem

Den kondenserade materiens fysik

DOI

10.1109/JLT.2023.3257963

Mer information

Senast uppdaterat

2024-03-07