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1 2024

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Non-linear cryptosystem utilizing biological mutation operation in the two-dimensional non-separable linear canonical transform domain

Sharma Bhavana, Singh Hukum, Rakheja Pankaj, Khurana Mehak

Optica Applicata

2024

Vol. 54, nr 4

581--607

This paper introduces a novel image encryption algorithm in the 2D-NSCT domain, employing a 4D hyperchaotic mapping, DNA coding with biological mutation, and the phase truncation and Fourier transfrom (PTFT) operation. Unlike existing DNA-based encryption methods that heavily rely on the XOR operator, our proposed scheme integrates a biological mutation operator to enhance the security of the encryption process. The performance and effectiveness of our cryptosystem are thoroughly evaluated through comprehensive experiments and analysis on various grayscale images, including Cameraman, Peppers, and Baboon images. Simulation results are presentedin this paper to demonstrate the performance of the proposed encryption algorithm. Notably, our algorithm exhibits high sensitivity to encryption parameters, and the utilization of DNA coding and PTFT adds an extra layer of security to the image encryption algorithm. To assess the resilience of our proposed algorithm, we conducted thorough simulations and subjected it to various challenges, including statistical attacks, noise attacks, occlusion attacks, classical cryptographic attacks, and special iterative attacks for asymmetric schemes, and along with brute-force attacks. The results validate the resilience of our proposed scheme and showcase its ability to withstand existing cryptographic attacks. Moreover, a comparative analysis was conducted to evaluate the performance of our proposed scheme against existing encryption algorithms of similar nature. The outcomes of this study clearly demonstrate that our encryption algorithm surpasses these existing schemes in terms of effectiveness and resilience against cryptographic attacks, affirming its superiority.