Affiliation:
1. School of Artificial Intelligence, Wuhan Technology and Business University, Wuhan 430065, China
2. School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236037, China
3. School of Information Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China
Abstract
A quantum noise stream cipher (QNSC) is a physical layer encryption technology based on quantum noise. Bit error rate loopback measurement (BER-LM) is a method to measure the BER of a loopback channel and extract channel characteristics. Then, channel characteristics can be extracted, and consensus keys can be obtained through negotiation. In previous studies, encryption and key distribution were implemented in independent channels. In this paper, we propose a scheme that combines these two technologies in a single fiber channel to achieve encrypted transmission and key distribution. We verified a 20 Gbps QPSK coherent optical transmission system with a PSK/QNSC scheme. The results show that by reasonably setting the negotiation bit position, the consensus key could be obtained through negotiation, and the requirements of transmission performance could be met. When the negotiation bit position was set to seven, the Q-factor of the system was nine, which met the error-free condition of the 7% forward error correction (FEC) limit.
Funder
the Special Fund of Advantageous and Characteristic disciplines (Group) of Hubei Province
BIGC Project
the Doctoral Program of BIGC
Scientific Research Project of Fuyang Normal University
Key scientific research project of Universities in 2021
Guiding project of Scientific Research Plan of Education Department of Hubei Province
University Natural Science Research Project of Anhui Province
University-level Natural Youth Funding Project of West Anhui University
Subject
Radiology, Nuclear Medicine and imaging,Instrumentation,Atomic and Molecular Physics, and Optics
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