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Nonlinear term-free chaotic signal masking-based signal encryption transmission and restoration method

A recovery method and information encryption technology, applied in the field of communication, can solve the problem of low information recovery accuracy, and achieve the effects of high precision, high engineering application value, and low distortion.

Inactive Publication Date: 2017-11-17
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

At the same time, the information recovery accuracy of the traditional linear steady synchronization law is not high, but the present invention provides a variable gain nonlinear synchronization law, which can improve the accuracy of information recovery and reduce the distortion of information after recovery

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  • Nonlinear term-free chaotic signal masking-based signal encryption transmission and restoration method
  • Nonlinear term-free chaotic signal masking-based signal encryption transmission and restoration method
  • Nonlinear term-free chaotic signal masking-based signal encryption transmission and restoration method

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] The invention discloses an information encryption and recovery method based on a chaotic system without nonlinear terms. figure 1 As shown, the chaotic system driving signal can be generated by the improved non-linear term chaotic system, and three constants are set in the system as keys. By superimposing the chaotic signal and the information to be transmitted, the concealment of information is realized. Then at the receiving end, the response chaotic...

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Abstract

The invention discloses a nonlinear term-free chaotic signal masking-based signal encryption transmission and restoration method. According to the method, driving chaotic system signals are generated through an improved nonlinear itemize-free chaotic system; the chaotic signals and information to be transmitted are superposed, so that the information can be masked; at a receiving end, the masked information and a key are adopted to construct a response chaotic system, and a kind of responsible variable-gain synchronization laws is constructed so as to realize the state synchronization of a driving system and a response system; and the information is restored from the encrypted information by means of the synchronized state, and therefore, the encryption and decryption restoration of the information can be realized. The information encryption and decryption method provided by the present invention has high security; the variable-gain synchronization method provided by the present invention makes chaotic synchronization have high precision, so that the recovered information has the advantage of small distortion, and therefore, the whole method of the invention has a high engineering application value.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a signal encryption transmission and restoration method based on the cover-up of a chaotic signal without nonlinear term. Background technique [0002] The chaotic system has good random characteristics because of its signal, and it is very sensitive to the initial value. Different initial value settings make its state response completely different. Therefore, it is very suitable for information encryption and concealment. At present, the research on secure communication using chaotic encryption and chaotic synchronous decryption has attracted the interest of researchers from all over the world. At present, chaotic cover-up is mainly divided into two types: direct cover-up and indirect cover-up. Direct cover-up is to superimpose information directly by addition, while indirect cover-up is to embed information into a certain parameter of the chaotic system, thereby changing th...

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Application Information

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IPC IPC(8): H04L9/00
CPCH04L9/001
Inventor 晋玉强王宏雷军委王玲玲杨莉莉于进勇
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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