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Double-image coupling encryption algorithm based on TLCS and misplacement diffusion
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DOI：10.1007/s11042-024-18432-4.png)
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Abstract
En 中文
A new double-image coupling encryption algorithm based on TLCS and misplacement diffusion is proposed. This paper proposes a new one-dimensional chaotic system: Tan-Log Chaotic System (TLCS), which has been proven to have good dynamic behavior through dynamic tests. First, this system is used to generate chaotic sequences for the scrambling and diffusion process. In the scrambling stage, the odd-numbered lines between the two images are first exchanged, and then the two images are Fisher-Yates scrambling based on the two chaotic sequences, and then index scrambling between the two images. In the diffusion stage, choose to use the jagged filling curve and chaotic sequences for misplacement diffusion to get two ciphertext images. Misplacement diffusion makes pixel values and chaotic sequences no longer correspond one to one, but are spaced at different intervals. Then two ciphertext images are put into the RGB component and the encrypted image is obtained. Experimental simulation and performance analysis show that this algorithm can resist common attacks such as known plaintext and selected plaintext attacks, differential attacks, and so on. Therefore, the proposed encryption algorithm has better security.
Keywords:
Double-image encryption
New chaotic system
Filling curve
Misplacement diffusion
RGB component
Journal
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3
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1.9W
Citations:
3.2W