- 期刊
An Improved Image Encryption Algorithm Based on Chaotic Mapping and Discrete Wavelet Transform Domain
摘要
The traditional chaotic image encryption algorithm has some problems, such as low security, image scrambling and diffusion (cannot resist the Chosen-plaintext attack), low efficiency and low key sensitivity and high correlation. Therefore, an improved image encryption algorithm based on chaotic mapping and discrete wavelet transform domain is proposed in this paper. First of all, the image scrambling only changes the position of each pixel, but cannot change the pixel value. Its statistical features do not change. Therefore, image encryption algorithm widely adopts the combination of scrambling and grayscale diffusion, through multiple rounds of encryption, to enhance the image confusion and diffusion characteristics. Then, the image is processed by wavelet transform. Finally, the image is mapped by chaos. Experimental results show that the algorithm has certain advantages in statistical performance, robust performance and key sensitivity and also meets the requirements of image security and real-time performance.
延伸閱讀
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