基于多方向像素连续折叠机制与Radon变换的图像加密算法

doi:10.11959/j.issn.1000-0801.2017236

Abstract

Abstract:

The image encryption algorithm based on multi-direction pixel continuous folding mechanism and Radon transform was proposed.Firstly,the initial plaintext was equally segmented to get left and right sub-blocks.Then the Radon transform was used to obtain the radon projection spectrum image by processing the left and right blocks at 0～180 degrees.And Radon projection spectrum image of left block was permutated by Arnold map,while the Radon projection spectrum image of right block was permutated based on gravity model to get two su-scrambling ciphers,then the entire scrambled image is formed by combining them.To diffuse pixels from multiple directions in space,four direction continuous folding mechanism was designed to change the pixel values by using the diffusion function corresponding to four different directions for realizing image encryption.The experimental results show that this algorithm has higher security and attack resistance with more uniform of pixel distribution in output cipher compared with the current image encryption technology.

Key words: image encryption, Radon transform, Radon projection spectrum, Arnold mapping, multi-direction pixel continuous folding, Gravity model

CLC Number:

TP391

Li SUN,Zhengqian HUANG,Zhenmao XIANG. Image encryption algorithm based on multi-direction pixel continuous folding mechanism and Radon transform[J]. Telecommunications Science, 2017, 33(9): 108-118.

Figures/Tables 11

References 14

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名称	本文算法	参考文献[6]算法	参考文献[11]算法
密文熵值	7.999 2	7.998 4	7.996 5

选取方向	图7(a)	图7(b)	图7(c)	图7(d)
水平	0.967 4	0.002 3	0.003 8	0.006 1
垂直	0.940 9	0.003 3	0.005 9	0.007 7
对角线	0.918 3	0.001 6	0.003 5	-0.004 8

Image encryption algorithm based on multi-direction pixel continuous folding mechanism and Radon transform

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