Chaotic secret optical communication system based on double random phase encoding

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 ...

AI Technical Summary

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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