Color image encryption algorithm based on complex chaos and affine transform
- LIU Zhijun
JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2016, 46(4):
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According to the characteristics of the color image,the color image airspace encryption algorithm was proposed based on quaternary compound chaotic system structured by the tent map and the Logistic, Cubic, Chebychev map rewrited, the three dimensional affine transformation, diffusion of disturbance key parameters and RGB components joint scrambling.The algorithm that correlation of RGB was very small, key space was huge large, bright ciphertext mapping relationship was complex, could resist exhaustion, plaintext, difference and statistical analysis attacks. The simulation experiment of the classic watermark, figures, landscape types of color images were achieved by matlab7.0. The experimental results(encryption, histogram analysis, the correlation between adjacent pixels, key and the ciphertext sensitivity, information entropy, peak signal-to-noise ratio and similarity)showed that the algorithm has good encryption effect and high safety features.