Cryptanalysis and improvement of a chaotic map-based image encryption system using both plaintext related permutation and diffusion
Journal
Entropy
Journal Volume
22
Journal Issue
5
Date Issued
2020
Author(s)
Lin, C.-Y.
Abstract
In 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.
Subjects
Chaotic map; Cryptanalysis; Diffusion; Image encryption; Permutation
Type
journal article