An improved bit shuffling pixels-based image scrambling method

Compared with the Arnold transform, the image scrambling method based on bit shuffling pixels is much more secure, and has higher efficiency and speed. However, the key space of this bit shuffling pixels based method is too small to resist exhaustive search attack. Therefore, an improved method based on chaos is proposed in this paper. The security of the improved scheme is enhanced by increasing the number of the keys. Theoretical analysis and experimental results show that the proposed method is effective and has higher security.