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Multi-chaotic mapping and DNA coding-integrated image encryption method and device

A technology of chaotic mapping and encryption method, applied in image data processing, secure communication device, image data processing and other directions, can solve the problems of low defense, low sensitivity of plaintext and key, inability to effectively resist statistical attacks, etc. Sensitivity, strong resistance to statistical attacks, good scrambling effect

Inactive Publication Date: 2018-01-19
CHONGQING UNIV OF EDUCATION
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Problems solved by technology

However, the current image encryption algorithm based on DNA coding technology and chaos theory has low defense against plaintext attacks, and has the disadvantage of low sensitivity to plaintext and keys. At the same time, there is correlation between adjacent pixels of the image, and a single replacement in the encryption algorithm Unable to effectively defend against statistical attacks

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  • Multi-chaotic mapping and DNA coding-integrated image encryption method and device
  • Multi-chaotic mapping and DNA coding-integrated image encryption method and device
  • Multi-chaotic mapping and DNA coding-integrated image encryption method and device

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Embodiment Construction

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0052] see figure 1 , is a flowchart of an image encryption method that integrates multiple chaotic maps and DNA coding according to the first embodiment of the present invention. Such as figure 1 As shown, the image encryption method of fusion many chaotic maps provided by this embodiment and DNA coding comprises the following steps:

[0053] First, in step S101 , an image scrambling step is performed to convert the target image into RGB three color component matrices, and use the Arnold transformation matrix to scramble the three color component...

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Abstract

The invention provides a multi-chaotic mapping and DNA coding-integrated image encryption method and a device thereof, an image decryption method and a device thereof. The image encryption method comprises an image scrambling step used for converting a target image into RGB three color component matrixes, and respectively scrambling the three color component matrixes by adopting an Arnold transformation matrix; a matrix replacement step used for respectively carrying out coding treatment on the three color component matrixes which have been scrambled by adopting different DNA coding schemes, carrying out DNA coding treatment on a chaotic sequence generated by chaotic mapping, and overlapping the three color component matrixes after being coded with the DNA to obtain replaced color component matrixes; and a ciphertext reconstruction step used for carrying out DNA unlocking on the replaced color component matrixes, combining the obtained color component matrixes to obtain a middle ciphertext, and diffusing the middle ciphertext after a sum value is calculated and according to the bitwise XOR form. The method is high sensitivity to plaintexts and secret keys. Meanwhile, the method andthe device have a good scrambling effect and a stronger anti-statistical attack resistance.

Description

technical field [0001] The present invention relates to the technical field of image encryption, in particular to an image encryption method and device integrating multiple chaotic maps and DNA encoding, and a corresponding decryption method and device. Background technique [0002] Image encryption is an effective method to prevent images from being intercepted and tampered with. Chaos is a deterministic random-like process in nonlinear dynamical systems, which has structural similarities with cryptography and is very suitable for image encryption. In the prior art, a combination of image scrambling and diffusion is used, and Logistic and Kent are used to generate control parameters, and a multi-chaotic image encryption algorithm is proposed. In addition, a fast digital image encryption algorithm based on Logistic chaotic system is proposed, which is simple and easy to implement, and has good encryption and recovery effects. Some researchers combined the Logistic chaotic ...

Claims

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Application Information

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IPC IPC(8): G06T1/00H04L9/00
Inventor 韦鹏程冉维段昂
Owner CHONGQING UNIV OF EDUCATION
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