Image encryption algorithm with random scrambling based on one-dimensional logistic self-embedding chaotic map

Abstract

• This work proposes a new one-dimensional chaotic system with better chaotic performance. • A novel random block strategy is designed based on the new chaotic map. • Bit-level confusion method is adopted using random block strategy. • The simulation results and security results demonstrate that the algorithm can resist common attacks. With the continuous development of information technology, ensuring information security has become an important issue. Image is widely used as a multimedia tool, so this paper proposes a chaotic image encryption algorithm based on scrambling and diffusion operations. In the scrambling stage, the whole image is represented in binary form and divided into several sub images. The sub images are scrambling at bit-level using the improved zigzag method proposed in this paper. After that, the pixel-level image is randomly shuffled once. In the diffusion phase, the row-by-row strategy is adopted, which can change the pixel value of the image, making the image more difficult to crack. The chaotic sequence used in the whole encryption operation is generated by the one-dimensional Logistic Self-embedding (1DLSE) chaotic system proposed in this paper. Compared with the traditional one-dimensional chaotic system, the new chaotic system has more chaotic performance. Simulation results and security analyses demonstrate that the proposed encryption algorithm has superior security and higher efficiency in practical application.