A New Color Image Encryption Scheme Based on Chaotic Hénon Map and Lü System

2017 ◽  
pp. 432-445
Author(s):  
Chong Fu ◽  
Gao-yuan Zhang ◽  
Bei-li Gao ◽  
Jing Sun ◽  
Xue Wang
Keyword(s):  
Image Encryption ◽  
Color Image ◽  
Encryption Scheme ◽  
Hénon Map ◽  
Color Image Encryption ◽  
Henon Map ◽  
Lü System ◽  
Lu System

Double color image encryption based on fractional order discrete improved Henon map and Rubik’s cube transform

2021 ◽  
pp. 116363
Author(s):  
Liping Chen ◽  
Yin Hao ◽  
Liguo Yuan ◽  
J.A. Tenreiro Machado ◽  
Ranchao Wu ◽  
...  
Keyword(s):  
Image Encryption ◽  
Fractional Order ◽  
Color Image ◽  
Hénon Map ◽  
Color Image Encryption ◽  
Henon Map ◽  
Rubik's Cube ◽  
Rubik’S Cube

An efficient novel color image encryption algorithm based on 3D Lü chaotic dynamical system and SHA-512

2020 ◽  
Vol 18 (05) ◽  
pp. 2050042
Author(s):  
K. Sundara Krishnan ◽  
B. Jaison ◽  
S. P. Raja
Keyword(s):  
Image Encryption ◽  
Color Image ◽  
Input Image ◽  
Encryption Algorithm ◽  
Color Image Encryption ◽  
Chaotic Dynamical System ◽  
Color Component ◽  
Lü System ◽  
Lu System ◽  
Image Encryption Algorithm

In this paper, an efficient novel dual permutation–substitution structure-based color image encryption algorithm is proposed. Initially, the Secure Hash Algorithm-512 (SHA-512) is applied to the input image to generate the initial values for the Lü system dynamically. In the first stage of permutation, inter-color-component pixel shuffling is carried out with a circular pixel-swapping mechanism. In the second stage, intra-color-component pixel shuffling is executed, based on pseudorandom positions generated by the Lü chaotic system. Pixel values are changed in the substitution stage, based on float-valued chaotic sequences generated by the Lü system. The performance of the proposed algorithm is evaluated with metrics such as key space, key sensitivity, histograms, correlation coefficients (vertical, horizontal and diagonal), information entropy, number of pixel changes rate (NPCR), unified average changing intensity (UACI), peak signal-to-noise ratio (PSNR), mean absolute error (MAE), contrast analysis, encryption time and the National Institute of Standards and Technology Special Publication 800-22 (NIST SP 800-22) statistical test. The experimental results obtained and performance assessment show that the proposed scheme has produced good results.

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