A Novel Multi-Channel Image Encryption Algorithm Leveraging Pixel Reorganization and Hyperchaotic Maps
Wei Feng,
Jiaxin Yang,
Xiangyu Zhao,
Zhentao Qin,
Jing Zhang,
Zhengguo Zhu,
Heping Wen,
Kun Qian
Affiliations
Wei Feng
School of Mathematics and Computer Science, Panzhihua University, Panzhihua 617000, China
Jiaxin Yang
School of Mathematics and Computer Science, Panzhihua University, Panzhihua 617000, China
Xiangyu Zhao
School of Electrical and Information Engineering, Panzhihua University, Panzhihua 617000, China
Zhentao Qin
School of Mathematics and Computer Science, Panzhihua University, Panzhihua 617000, China
Jing Zhang
School of Mathematics and Computer Science, Panzhihua University, Panzhihua 617000, China
Zhengguo Zhu
School of Mathematics and Computer Science, Panzhihua University, Panzhihua 617000, China
Heping Wen
School of Electronic Information, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, China
Kun Qian
Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications, Hunan Institute of Science and Technology, Yueyang 414006, China
Chaos-based encryption is promising for safeguarding digital images. Nonetheless, existing chaos-based encryption algorithms still exhibit certain shortcomings. Given this, we propose a novel multi-channel image encryption algorithm that leverages pixel reorganization and hyperchaotic maps (MIEA-PRHM). Our MIEA-PRHM algorithm employs two hyperchaotic maps to jointly generate chaotic sequences, ensuring a larger key space and better randomness. During the encryption process, we first convert input images into two fused matrices through pixel reorganization. Then, we apply two rounds of scrambling and diffusion operations, coupled with one round of substitution operations, to the high 4-bit matrix. For the low 4-bit matrix, we conduct one round of substitution and diffusion operations. Extensive experiments and comparisons demonstrate that MIEA-PRHM outperforms many recent encryption algorithms in various aspects, especially in encryption efficiency.
