Chaotic secret optical communication system based on double random phase encoding

A double random phase, optical communication system technology, applied in the field of chaotic security optical communication system, can solve the problems of limited key space, poor fast reconfigurability of key, disturbance of chaotic signal strength, etc., to achieve enhanced security and expanded encryption The effect of the key space

Pending Publication Date: 2020-06-19
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0006] In order to solve the problems of key parameter leakage of chaotic transmitter, limited key space, and poor fast reconfigurability of keys in the existing chaotic secure optical communication system, the present invention proposes a chaotic secure optical communication based on double random phase encoding system, which realizes the chaos signal intensity disturbance scheme through double random phase encoding outside the chaotic transmitter cavity, and can realize the enhancement of the security of the chaotic optical communication system

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  • Chaotic secret optical communication system based on double random phase encoding

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Embodiment 1

[0026] Such as figure 1 As shown, a chaotic security optical communication system based on double random phase encoding, including

[0027] The sending end 1 is used to perform intensity modulation 103 on the chaotic light signal 101 sent by the chaotic light source and the confidential data 102 to be transmitted to obtain a chaotic modulation signal;

[0028] A dual random phase encoding device for receiving chaotic modulated signals, said dual random phase encoding device comprising a first phase modulation module, a dispersive device 106, and a second phase modulation module;

[0029] The first phase modulation module is driven by a random key sequence A104, and is used to dynamically apply different first phase encodings 105 to the chaotic modulation signals at different times in the time domain; the chaotic signal after the first phase encoding 105 Enter the dispersion device 106, interact with the dispersion device 106, through the phase-intensity conversion of the disp...

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Abstract

The invention discloses a chaotic secret optical communication system based on double random phase encoding, and the system comprises a transmitting end which carries out the intensity modulation of achaotic optical signal and secret data; the double random phase encoding device comprises a first phase modulation module, a dispersion device and a second phase modulation module; the first phase modulation module is driven by a random key sequence A; different first phase codes are dynamically applied to the chaotic modulation signal in a time domain, then the chaotic modulation signal enters adispersion device and interacts with the dispersion device, through phase-intensity conversion of the dispersion device, intensity distribution of the chaotic modulation signal is disturbed in the time domain, and the waveform of the chaotic modulation signal is converted into a random-like noise signal; and the second phase modulation module is driven by the random key sequence B, performs second phase encoding on the chaotic modulation signal, and performs phase disturbance on the chaotic signal. According to the invention, the security of the secret data of the chaotic sending end is significantly enhanced.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, to a chaotic security optical communication system based on double random phase encoding. Background technique [0002] Chaotic secure communication has the advantages of high transmission rate, long distance, and compatibility with existing optical communication technologies. Chaotic secure optical communication uses the randomness of chaotic signals to hide confidential information in chaotic signals at the physical layer, and restore the original chaotic carrier signal through chaos synchronization to extract confidential information. [0003] In a chaotic secure communication system, the security of chaotic signals mainly depends on whether the chaotic synchronization at the receiving end can be realized. Only by constructing a chaotic receiver with the same structural parameters and working parameters as the transmitter, the eavesdropper can realize the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L9/08H04B10/548H04B10/2525
CPCH04L9/001H04L9/0869H04B10/2525H04B10/548H04L9/0863
Inventor 高震森李启华安跃华吴琼琼马子洋王云才秦玉文
Owner GUANGDONG UNIV OF TECH
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