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Cryptanalysis and improvement of a chaotic image encryption by first-order time-delay system
journal contributionposted on 2018-07-01, 00:00 authored by M Li, H Fan, Yong XiangYong Xiang, Y Li, Yushu Zhang
© 1994-2012 IEEE. 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.