Cryptanalysis and Improvement of a Chaotic Image Encryption by First-Order Time-Delay System
Ming Li, Haiju Fan, Yong Xiang, Li Yang, Yushu Zhang · IEEE Multimedia · 2018
This paper found that a novel hyper-chaotic based image encryption scheme is vulnerable to chosen plaintext attack. By performing permutation before the vector partition and adding two-round crossover diffusion at the end of the encryption, the security of the original scheme has been greatly improved.