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Novel encryption for color images using fractional‑order hyperchaotic system

Research Date
Research Department
Research Journal
Journal of Ambient Intelligence and Humanized Computing
Research Publisher
Springer Berlin Heidelberg
Research Vol
13(2)
Research Website
https://link.springer.com/article/10.1007/s12652-021-03675-y
Research Year
2022
Research_Pages
973-988
Research Abstract

The fractional-order functions show better performance than their corresponding integer-order functions in various image processing
applications. In this paper, the authors propose a novel utilization of fractional-order chaotic systems in color image
encryption. The 4D hyperchaotic Chen system of fractional-order combined with the Fibonacci Q-matrix. The proposed
encryption algorithm consists of three steps: in step#1, the input image decomposed into the primary color channels, R, G,
& B. The confusion and diffusion operations are performed for each channel independently. In step#2, the 4D hyperchaotic
Chen system of fractional orders generates random numbers to permit pixel positions. In step#3, we split the permitted image
into 2 × 2 blocks where the Fibonacci Q-matrix diffused each of them. Experiments performed where the obtained results
ensure the efficiency of the proposed encryption algorithm and its ability to resist attacks.