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Encryption and decryption method based on unified chaotic system

A technology of chaotic system and encryption method, which is applied in the direction of secure communication, transmission system, and digital transmission system through chaotic signals, which can solve the problem of low security between the sending end and the receiving end, and achieve the effect of good application value

Inactive Publication Date: 2019-08-13
TAIYUAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0003] The problems in the existing technology are as follows: the security of the sending end and the receiving end of the single system structure is low; the system form is fixed, and the system will not change during the confidential communication process; the encryption method of the sending end and the receiving end is simple, only using chaotic A method in masking, chaotic modulation, chaotic keying to encrypt a signal

Method used

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  • Encryption and decryption method based on unified chaotic system
  • Encryption and decryption method based on unified chaotic system
  • Encryption and decryption method based on unified chaotic system

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described in more detail below in conjunction with specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] refer to figure 1 , figure 1 It is a schematic flowchart of an encryption method based on a unified chaotic system provided by the present invention. The steps of the method include:

[0030] S110: Start the Lorenz chaotic system to generate a first chaotic signal.

[0031] S120: Modulate the unified chaotic system parameters with the first chaotic signal generated by the Lorenz chaotic system, and run the unified chaotic system to generate the second chaotic signal.

[0032] S130: Encrypt the origina...

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Abstract

The invention discloses an encryption and decryption method based on a unified chaotic system. Chaos modulation and chaos covering technologies are adopted to achieve multi-level encryption; the characteristics of a unified chaotic system are utilized, the unified chaotic system is switched among different types of chaotic systems by modulating system parameters, the system property is more complex, meanwhile, synchronization with a sending end system is realized by utilizing an encrypted signal, and a decryption signal is obtained by utilizing the synchronized system and adopting a decryptionprocess opposite to that of the sending end. The method can be used for secret communication in the national defense communication field and can also be applied to the civil secret communication service industry, secret signals can be disguised as random white noise in reality due to the pseudo-random property of the chaotic system, and the method has good application value.

Description

technical field [0001] The invention relates to the field of secure communication, in particular to an encryption and decryption method based on a unified chaotic system. Background technique [0002] Chaos refers to the general term for the uncertain behavior exhibited in deterministic systems. Due to the complex properties of self-similarity, initial value sensitivity, positive Lie exponent and pseudo-randomness, chaotic signals have attracted extensive attention. Especially because the chaotic signal is pseudo-random, similar to white noise in reality, it is difficult to be deciphered by secret stealers. At present, the existing chaotic secure communication mechanism has a simple encryption method and a fixed system form, and the behavior of the system can be inferred by phase space reconstruction technology. [0003] The problems in the existing technology are as follows: the security of the sending end and the receiving end of the single system structure is low; the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L27/00H04L29/06
CPCH04L9/001H04L27/001H04L63/0428
Inventor 张昊孙玉洁张勇张聪珊
Owner TAIYUAN UNIV OF TECH
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