Abstract
This paper makes use of the characteristics of initial sensitivity and randomness of the chaotic map to design an image encryption algorithm based on the sine map and the tent map. The sine map is used to improve the tent map; then, the improved sine-tent map is proposed. The traditional tent map proposed in this paper has an expanded control parameter range and better chaos. In this algorithm, bit rearrangement is adopted to further improve the improved sine-tent map, which can reconstruct the output value and expand the chaotic characteristics of the map. In this algorithm, the image parameters are connected with the algorithm to generate the key. In the encryption step, a method of replacing the most significant bit and scrambling-diffusion algorithm is designed to encrypt the plaintext image. Finally, the algorithm is simulated with the experiment and evaluated with analysis; then, the experimental results are given. The evaluation results show that the ciphertext of the algorithm has high randomness, strong robustness, and better resistance to differential attacks after comparison. The correlation of the ciphertext image pixels is very low, and the algorithm is highly secure as a conclusion.
Highlights
An algorithm for image encryption is proposed in this paper
Encrypting digital images is hiding the information carried in these two-dimensional sequences, so that the attackers cannot read it
Banu et al [14] studied an encryption algorithm based on integer wavelet transform (IWT) combined with deoxyribonucleic acid (DNA) and chaos to secure digital medical images. e proposed work will be composed of two phases: a two-stage shuffling phase and a diffusion phase. e first step of shuffling starts with initial block confusion followed by the column and row shuffling of pixels as the second stage
Summary
An algorithm for image encryption is proposed in this paper. Discrete Dynamics in Nature and Society security, and encryption algorithms based on the chaotic map are constantly being proposed. Literature [9] proposed a bit embedding based on the chaotic tent map as a novel multicore implementation of the steganography algorithm. Literature [13] designed an improved cryptosystem based on a 2D-SCL map It combined the confusion and diffusion process in one stage to increase the speed of operation. Banu et al [14] studied an encryption algorithm based on integer wavelet transform (IWT) combined with deoxyribonucleic acid (DNA) and chaos to secure digital medical images. We will verify the technology through experimental simulation, effectiveness, and practicality by calculating a series of indices in Section 5. e remaining section is the conclusion
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