Image Encryption in Frequency Domain Using Hybrid Chaotic Maps, Hashing, and Lifting Wavelet Transform
摘要
In the era of rapid digitization and extensive data exchange, security of transmitted data has become a significant concern. To overcome this issue, this paper proposes an image encryption scheme comprising of the integration of multiple chaotic maps including Logistic Sine-Cosine Map, Logistic Sine-Tent Cosine Map and Tent-Sine Map to increase the chaotic range of inducing noise, Lifting Wavelet Transform to extract LL band from it since the encoding is carried out on LL band, permutation to rearrange pixel values of plain-text image, and dynamic substitution technique by using three S-boxes to replace the pixel values, and SHA-512 to generate hash functions. These components result in the extreme confusion and diffusion into the plain-text image for securing transmission of multimedia data. The proposed encryption algorithm has been verified by computing different security parameters, which ensure high quality of image encryption by ideal results.