High-security transmission method based on three-dimensional constellation dual encryption

Abstract

The invention discloses a high-security transmission method based on three-dimensional constellation dual encryption. The method comprises the following steps ofperforming serial-parallel conversion on binary data of a transmitting end,performing constellation mapping on the three-dimensional data to form constellation points,generating a constellation point displacement vector and a rotation vector by using a chaotic sequence of the Chua's chaotic model, and performing displacement transformation and rotation transformation on the three-dimensional constellation point,processing the encryptedthree-dimensional signal by utilizing three-dimensional carrier-free amplitude phase modulation, superposing the processed three-dimensional signal into a single-path signal, and transmitting the single-path signal in a channel,and demodulating the received signal at a receiving end to finally obtain original data. A Chua's circuit model is utilized to generate a chaotic sequence to perform displacement and rotation change on the position of a constellation point, so that twice encryption of a constellation diagram is realized, and the safety performance of the system is effectively improved;and the transmission capability of the system is effectively improved by utilizing the high gain index and the high anti-noise performance of the constellation.

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...

AI Technical Summary

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

Images