A High Security Transmission Method Based on Double Encryption of Three-Dimensional Constellation

Abstract

The invention discloses a high-security transmission method based on double encryption of three-dimensional constellations, which comprises the following steps: performing serial-to-parallel conversion on the binary data at the transmitting end; performing constellation mapping on the three-dimensional data to form constellation points; using Cai's chaotic model The chaotic sequence generates the displacement vector and rotation vector of the constellation point, and performs displacement transformation and rotation transformation on the three-dimensional constellation point; uses three-dimensional carrier-free amplitude phase modulation to process the encrypted three-dimensional signal, and superimposes the processed three-dimensional signal into a single-channel signal. Enter the channel transmission; demodulate the received signal at the receiving end, and finally obtain the original data. The invention utilizes the Chua's circuit model to generate a chaotic sequence to change the position of the constellation point by displacement and rotation, realizes two encryptions of the constellation diagram, and effectively improves the security performance of the system; utilizes the high gain index and high anti-noise performance of the constellation to effectively improve the system transmission capacity.

Description

technical field [0001] The invention relates to optical transmission technology in the communication field, in particular to a high-security transmission method based on three-dimensional constellation double encryption. Background technique [0002] With the rapid development of 5G, 4K video, cloud computing and other services, the communication field will face a wider space, more new space needs to be expanded, and more new services will be developed. The huge demand for information capacity makes communication security issues have attracted increasing attention. [0003] Traditional encryption methods based on advanced layers cannot effectively resist physical layer attacks such as interception and illegal eavesdropping, and encryption processing based on advanced layers does not have the characteristics of high speed and low delay, so it is difficult to meet the current needs of high-speed optical communication. The current method for improving the security of the physi...

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Problems solved by technology

[0004] At the same time, most traditional chaotic systems encrypt the physical layer based on two-dimensional QAM constellation diagrams. The positions of the constellation points are relatively fixed, and the encryption method is not flexible enough.

Most of the current research is done in 2D constellation diagrams, rarely considering 3D or even higher dimensions

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