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A plaintext-associated fractional order chaotic image encryption method

An encryption method and fractional-order technology, which can be used in digital transmission systems, digital data protection, secure communication devices, etc., and can solve problems such as inability to effectively resist statistical characteristic analysis.

Inactive Publication Date: 2019-06-21
CHONGQING UNIV OF POSTS & TELECOMM
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The main problem existing in the current chaotic image encryption algorithm is that it cannot effectively resist the analysis of statistical characteristics and chosen plaintext attacks. Aiming at this problem, a fractional order chaotic image encryption method associated with plaintext is proposed.

Method used

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  • A plaintext-associated fractional order chaotic image encryption method
  • A plaintext-associated fractional order chaotic image encryption method
  • A plaintext-associated fractional order chaotic image encryption method

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0115] Implementation 2 Encryption Algorithm Performance Analysis

[0116] Table 1 and Table 2 are the plaintext sensitivity analysis and ciphertext sensitivity analysis of the encryption algorithm respectively. It can be seen from the table that their indicators are close to the theoretical value, indicating that the algorithm has good plaintext sensitivity and ciphertext sensitivity. It can effectively resist chosen plaintext attack and chosen ciphertext attack.

[0117] Table 1 Plaintext Sensitivity Analysis

[0118]

[0119] Table 2 Ciphertext Sensitivity Analysis

[0120]

[0121] From the above, it can be proved that the algorithm of the present invention can not only better resist differential attack and statistical characteristic analysis, but also can effectively resist chosen plaintext attack and chosen ciphertext attack.

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Abstract

The invention provides a plaintext-associated fractional order chaotic image encryption method. Firstly, the adopted chaotic system is a four-dimensional fractional order chaotic system, and comparedwith the chaotic system, the chaotic system is more complex in dynamic characteristic, larger in key space and more advantageous in encryption. Secondly, for most existing plaintext association encryption algorithms, the algorithm is only related to plaintext in a diffusion stage or a scrambling stage; in order to further improve the plaintext attack resistance, the image encryption method provided by the invention not only relates to image pixel diffusion and plaintext, but also relates to image position scrambling and plaintext, the image pixel diffusion adopts a secondary key plaintext association encryption algorithm, and the image position scrambling adopts a plaintext association image encryption algorithm. Experimental simulation shows that the method not only can well resist statistical property analysis, but also can effectively resist plaintext selection attacks and ciphertext selection attacks.

Description

technical field [0001] The invention relates to the field of image encryption, in particular to a method for encrypting a plaintext-related fractional order chaotic image. Background technique [0002] With the rapid development of mobile Internet technology and multimedia technology, people have more and more diverse ways of expressing information. Multimedia data such as images, voices and videos can be presented, copied and displayed on various Internet terminals conveniently, quickly and in real time through social networks. spread. Among them, images can convey information directly and vividly, and people are more willing to receive image information, so digital images are widely used in our daily life and are closely related to our network life. However, there are many security risks in the transmission of digital images on the network. The image transmission network environment is not necessarily safe, and there may be network loopholes. Driven by profit or other pu...

Claims

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Application Information

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IPC IPC(8): G06F21/60H04L9/00
Inventor 周围吴周青
Owner CHONGQING UNIV OF POSTS & TELECOMM
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