Journal
MULTIMEDIA TOOLS AND APPLICATIONS
Volume 80, Issue 12, Pages 17983-18006Publisher
SPRINGER
DOI: 10.1007/s11042-021-10584-x
Keywords
Image encryption; Hyperchaos; Cascade modulation coupled hyperchaotic
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This paper introduces a novel two-dimensional hyperchaotic system and proposes an image encryption algorithm based on it, demonstrating its security performance through various experiments.
In this paper, we design a novel two-dimensional hyperchaotic with two positive Lyapunov exponents and a phase distribution region close to uniform. Then, we propose a novel randomized hyperchaotic image encryption algorithm based on the proposed two-dimensional hyperchaotic mapping. The algorithm is designed in such a way that first adds randomization to the input image, and uses the SHA-256 value of the randomized image with the key for extracting required parameters. This randomization property is required for CPA-security. The security performance of the proposed encryption algorithm is illustrated by several experiments, including robustness against noise and data loss attacks, statistical, differential, and brute-force attacks. These experiments reveal acceptable security in comparison with several recent chaotic image encryption algorithms.
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