Lin, C.-Y.C.-Y.LinJA-LING WU2021-05-052021-05-052020https://www.scopus.com/inward/record.url?eid=2-s2.0-85086665849&partnerID=40&md5=a79579cea05611de0516345d1448f06fhttps://scholars.lib.ntu.edu.tw/handle/123456789/559004In theory, high key and high plaintext sensitivities are a must for a cryptosystem to resist the chosen/known plaintext and the differential attacks. High plaintext sensitivity can be achieved by ensuring that each encrypted result is plaintext-dependent. In this work, we make detailed cryptanalysis on a published chaotic map-based image encryption system, where the encryption process is plaintext Image dependent. We show that some designing flaws make the published cryptosystem vulnerable to chosen-plaintext attack, and we then proposed an enhanced algorithm to overcome those flaws. © 2020 by the authors.Chaotic map; Cryptanalysis; Diffusion; Image encryption; Permutationjournal article10.3390/E220505892-s2.0-85086665849WOS:000541900700039