Demonstration of a Key Distribution Scheme Based on the Masking Effect of Fiber Channel Noise in Power Transmission System  
[PERSON]  
1 School of Artificial Intelligence, Wuhan Technology and Business University, Wuhan 430065, China 12 School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang 236037, China 2  
[PERSON]  
1 School of Artificial Intelligence, Wuhan Technology and Business University, Wuhan 430065, China 1,1*  
[PERSON]  
1 School of Information Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China 13 School of Information and Network Engineering, Anhui Science and Technology University, Bengbu 233030, China 3  
[PERSON]  
4 College of Information and Network Engineering, Anhui Science and Technology University, Bengbu 233030, China 4  
[PERSON]  
1 School of Artificial Intelligence, Wuhan Technology and Business University, Wuhan 430065, China 1,1*  
[PERSON]  
1 School of Artificial Intelligence, Wuhan Technology and Business University, Wuhan 430065, China 1,  
the physical layer, only QKD protocols can achieve theoretically absolute security [10; 11; 12; 13; 14; 15]. However, QKD has some limitations in terms of key distribution rate and transmission distance. Because it is impossible to amplify a single photon using an optical amplifier without changing the polarization state, its key transmission distance is seriously limited [16]. At present, quantum information processing is the research and development hotspot of quantum science, which aims to improve the speed and performance of smaller and smaller quantum information systems by using light states. In the past decade, there have been many ways to realize QKD, and quantum photonics has made a series of research achievements. In 2016, [PERSON] reported a highly efficient energy time entangled photon pair source in a Complementary Metal Oxide Semiconductor (CMOS)-compatible silicon photonic ring resonator. This demonstrates the high purity of energy time entanglements, thus there is no photon noise and there is nearly perfect original visibility between different channel pairs in the telecommunications C-band, which produces a multiplexing system of continuous energy time entanglement [17]. An integrated weak coherent transmitter is proposed in [18]. The transmitter is based on a monolithic indium phosphide Indium Phosphide (InP) device and uses the reconfigurability of the device to demonstrate three QKD protocols-BB84. When these devices are used together with integrated single photon detectors, they pave the way for the successful integration of QKD into future telecommunications networks [18]. Reference [19] proposed an ultra-compact high-performance silicon on insulator pump stop filter with large rejection ratio, narrow bandwidth and low insertion loss, which is used to preserve single photons in photonic quantum systems. The device ensures the large suppression of the pump signal in a wide-ranging photonic system for quantum information processing, thereby improving the Spontaneous Four-Wave Mixing (SFWM) efficiency. In 2013, [PERSON] et al. used integrated optical devices to assemble the central components of an optical coherence tomography (OCT) system on silicon chips. To further improve the coupling between the optical path and the dispersive element, the signal-to-noise ratio should also be improved [20]. The QKD equipment is incompatible with the existing communication system, and its deployment cost is very high. Therefore, it is necessary to explore a cost-effective key distribution method with a long transmission distance. This paper proposes a key distribution method based on the masking effect of fiber channel noise. Although it is not absolutely secure, it is compatible with existing optical fiber transmission systems. As optical amplifiers can be used, the key distribution distance is much longer than the QKD scheme. [PERSON] converts the random data using the random basis (A or B). Due to the channel noise, the eavesdropper cannot accurately distinguish the basis used by [PERSON].