Multi-image Encryption Algorithm in Space Domain Based on Chaotic System

An encryption algorithm and chaotic system technology, applied in the field of image processing, can solve the problems of unsatisfactory encryption efficiency and complicated operation, and achieve the effects of simple structure, high encryption efficiency and high security.

Inactive Publication Date: 2020-11-20
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tang et al. proposed a MIE algorithm based on bit-plane decomposition and chaotic mapping, but its operation is complex and the encryption efficiency is not ideal

Method used

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  • Multi-image Encryption Algorithm in Space Domain Based on Chaotic System
  • Multi-image Encryption Algorithm in Space Domain Based on Chaotic System
  • Multi-image Encryption Algorithm in Space Domain Based on Chaotic System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] Embodiment: overall implementation principle and detailed steps

[0039] Step 1: Enter the plaintext image file and key;

[0040] The plaintext image is k grayscale images with a size of m×n pixels, and the bit depth is d; the key form is (x, y, d 1 ,p 1 , d 2 ,p 2 ), where (x,y) is the size of the image block, (d 1 ,p 1 ) is the key of the scrambling phase, (d 2 ,p 2 ) is the key of the diffusion stage;

[0041] Step 2: Scrambling the plaintext image, the specific process is:

[0042] Step 2.1: Iterate the PWLCM system, the formula is as follows:

[0043]

[0044] where p is the control parameter, x i is the system initial value x 0 The value after iterating i times, p∈(0,0.5),x i ∈(0,1); with d in the key 1 As the initial value of the system, p 1 As a control parameter, the PWLCM system iteratively times, discard the results of the previous l iterations, and get the length The chaotic sequence S p ;

[0045] Step 2.2: rearrange the chaotic seque...

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Abstract

The invention belongs to the field of image processing, and provides a spatial domain multi-image encryption algorithm based on a chaotic system, which comprises a bit-level multi-image scrambling mode and a multi-image diffusion mode. In the algorithm, pixel points in one image can be dispersed into different images after being scrambled, and tiny variation in a plaintext image can be diffused into all the images. The algorithm can achieve high safety in histogram analysis, correlation coefficient analysis and information entropy analysis, is simple in structure, high in encryption efficiencyand easy to implement, and can be applied to the fields of business, electronic government affairs, personal affairs and the like.

Description

technical field [0001] The invention belongs to the field of image processing, and mainly relates to information protection, information security technology and encryption technology in the field of digital multimedia information. It specifically relates to a space domain multi-image encryption algorithm based on chaotic system. Background technique [0002] Today, the rapid development of computer and network technology has brought earth-shaking changes to people's lives, and various digital information is widely used and disseminated. Among them, the application scenarios of multimedia information, especially digital images, involve many fields. Images can carry a lot of private information, and image information in special fields such as military and business has high requirements for confidentiality. However, digital images have the characteristics of large amount of data, high pixel correlation, and large data redundancy. It is not very suitable to use traditional enc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/10G06F21/60G06F21/62
CPCG06F21/10G06F21/602G06F21/6209
Inventor 王书雯张伟于海朱志良
Owner NORTHEASTERN UNIV LIAONING
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