Color image encryption algorithm based on novel 2D hyper-chaotic system and DNA crossover and mutation

As the quick advancement of multimedia technology, images are employed extensively in the domains of medicine, military, and transportation. In the meantime, image security has become an increasingly prominent issue. To ensure the image security, a color image encryption algorithm is proposed using our designed two-dimensional (2D) hyper-chaos, three-dimensional (3D) L-shaped transformation and DNA crossover and mutation. Firstly, we use our designed 2D hyper-chaos to generate four chaotic sequences, which are mainly used to complete scrambling and diffusion operations. Secondly, an image cube is constructed using the image blocks, and then the image cube is permuted using our designed 3D L-shaped transformation. Thirdly, we can get a DNA sequence by encoding the permuted image cube, and then we permute the DNA sequence using the index sequence of the chaotic sequence. Finally, the permuted DNA sequence is diffused using dynamic DNA operations, crossover and mutation. The security and execution time analyses illustrate that our algorithm has robust security and high efficiency, making it ideally suited for application in real-time image cryptosystems.