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A high-speed chaotic secure transmission method based on coherent detection

A technology of confidential transmission and coherent detection, which is applied in the field of secure communication transmission, can solve difficult problems such as compatibility of high-speed optical communication systems

Active Publication Date: 2022-02-01
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, quantum key distribution can realize unconditionally secure key distribution, but this method is difficult to be compatible with high-speed optical communication systems

Method used

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  • A high-speed chaotic secure transmission method based on coherent detection
  • A high-speed chaotic secure transmission method based on coherent detection
  • A high-speed chaotic secure transmission method based on coherent detection

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Experimental program
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Effect test

Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] A kind of high-speed chaotic secret transmission method based on coherent detection of the present invention comprises the following steps:

[0038] Step 1: At the transmitting end of the chaotic secure transmission system, the optical chaotic carrier c(t) and the transmission information m(t) are optically coupled through an orthogonal basis (orthogonal polarization or orthogonal phase, but not limited to this), The transmitted information is covered by the noise-like characteristics of the chaotic carrier, and the chaotic masking signal cm(t) is obtained.

[0039] Step 2: By adding phase fast perturbation and polarization fast perturbation to the chaotic masking signal cm(t), the security of the chaotic signal is improved; then, it enters the optical fiber transmission link for transmission.

[0040] Step 3: The chaotic mask...

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Abstract

The invention discloses a high-speed chaotic secure transmission method based on coherent detection, specifically: at the transmitting end of the chaotic secure transmission system, the optical chaotic carrier and the transmission information are optically coupled through an orthogonal basis, and through the noise-like characteristics of the chaotic carrier Cover the transmission information to obtain the chaotic cover signal; add phase fast perturbation and polarization fast perturbation, and then enter the optical fiber transmission link for transmission; at the receiving end, use coherent detection technology to obtain the chaotic cover signal, and compensate the linearity by digital signal processing And nonlinear effects, and then through the chaotic decryption algorithm based on the polarization orthogonal basis or the chaotic decryption algorithm based on the phase orthogonal basis, finally realize the separation of the chaotic carrier and signal to complete the decryption operation. The present invention can realize long-distance transmission and decryption of high-speed chaotic secret signal in multiple transmission services, multiple transmission wavelengths, multiple fiber cores, multiple modes, and high-speed secure communication transmission system.

Description

technical field [0001] The invention belongs to the field of safe communication transmission, in particular to a high-speed chaotic secret transmission method based on coherent detection. Background technique [0002] In recent years, with the rapid development of various multimedia data services (such as: big data, cloud computing, Internet of Things, machine-to-machine communication, remote surgery, etc.), people's demand for transmission capacity is also increasing, and global network traffic It has experienced explosive growth in the past ten years. Optical fiber communication is increasingly replacing copper cables due to its advantages of high bandwidth and anti-electromagnetic interference, and is widely used in communication data transmission in modern society. Due to the diversity of optical fiber transmission network application scenarios, the invisible increase may increase the risk of messages being eavesdropped or intercepted in the transmission network. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04B10/85H04B10/2513H04B10/516H04B10/61
CPCH04L9/001H04B10/85H04B10/2513H04B10/516H04B10/616H04B10/6161H04L27/04H04L27/20H04L27/36H04L27/001H04L9/0852H04B10/614H04L9/0858H04L9/3066H04L27/1525
Inventor 闫连山蒋林盘艳易安林潘炜
Owner SOUTHWEST JIAOTONG UNIV
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