A Long-Distance Key Distribution System Based on Chaotic Synchronization

A key distribution system and chaotic synchronization technology, applied in the field of secure optical communication, can solve the problems of low security, short distribution distance, and analog signals are easily affected by noise, and achieve the effect of increasing distribution distance and improving synchronization quality.

Active Publication Date: 2022-04-19
TAIYUAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problems that the existing key distribution schemes have low security or short distribution distance, and use analog signals as the driving source, so they are easily affected by noise, and provide a safe and long-lasting Long-distance Key Distribution System Based on Chaos Synchronization for Distance Transmission

Method used

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  • A Long-Distance Key Distribution System Based on Chaotic Synchronization
  • A Long-Distance Key Distribution System Based on Chaotic Synchronization

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Embodiment 1

[0015] Embodiment 1: A long-distance key distribution system based on chaos synchronization, such as figure 1 As shown, it includes A side, B side and a driving part. The driving part simultaneously serves as the driving source of A side and B side to form a "one driving two" structure. The driving part includes sequentially connected narrow linewidth lasers 1, the first polarization control 2, the first erbium-doped fiber amplifier 3, the intensity modulator 4, the isolator 5 and the first fiber coupler 6, the first fiber coupler 6 includes an input port and two output ports, the intensity modulator 4 is not connected with The other input end connected to the first erbium-doped fiber amplifier 3 is connected with a first arbitrary waveform generator 7, and the digital signal output by the first arbitrary waveform generator 7 is modulated by the intensity modulator 4 to the optical signal sent by the narrow linewidth laser 1 form a digital optical signal; the A side and the B...

Embodiment 2

[0019] Embodiment 2: A long-distance key distribution system based on chaos synchronization, such as figure 2 As shown, it includes A side, B side, the first arbitrary waveform generator 7 and the first driving part and the second driving part with the same structure. The first and second driving parts are divided into the driving sources of A side and B side to form " Two-drive two" structure, the first and second drive parts include a narrow linewidth laser 1, a first polarization controller 2, a first erbium-doped fiber amplifier 3, an intensity modulator 4, an isolator 5 and a first optical fiber connected in sequence Coupler 6, the first optical fiber coupler 6 includes an input port and an output port, and the two output ports of the first arbitrary waveform generator 7 are respectively connected to the intensity modulator 4 in the first and second driving parts through the long-distance optical fiber 20 The other input terminal that is not connected with the first erbi...

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Abstract

The invention belongs to the technical field of secure optical communication, specifically a long-distance key distribution system based on chaos synchronization, which solves the technical problems in the background technology, and includes a "one drive two" communication structure composed of a driving part and two communication parties , or a "two-drive-two" communication structure composed of two drive parts and two communication parties respectively connected. The invention uses the digital optical signal as the driving signal, and responds to the synchronous state of the laser output signal by keying the phase regulation of the injected light. During this process, the digital signal is used as the driving signal for long-distance transmission, and the digital signal is less affected by the noise in the link. The synchronization quality is improved, thereby increasing the key distribution distance, which can be used for longer-distance transmission and improves the quality of long-distance synchronization.

Description

technical field [0001] The invention belongs to the technical field of secure optical communication, in particular to a chaotic synchronization-based long-distance key distribution system. Background technique [0002] Confidential communication is related to national stability, social security, privacy protection and many other aspects. In today's era, secure communication is developing in the direction of large capacity and long distance. There are two main types of secure communication: encrypting the channel and encrypting the message. The security of information encryption depends on the security of the key. The existing secure communication distance is limited by the key distribution distance. Therefore, the safe long-distance distribution of keys to legitimate communication parties is an important research content for long-distance secure communication. [0003] The existing key distribution scheme based on chaotic synchronization is that the legal user uses the sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04B10/25H04B10/50H04B10/54H04B10/80
CPCH04L9/001H04B10/503H04B10/54H04B10/802H04B10/25
Inventor 王安帮彭小慧王龙生巢萌赵彤贾志伟郭园园王云才
Owner TAIYUAN UNIV OF TECH
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