Asian Journal of Physics Vol. 34, Nos 7 & 8 (2025) 531-542

Wavelength multiplexing for double color images reconstruction: Leveraging indexed images and phase retrieval algorithm

Indu Saini1,2, Neelam Sharma1, Shalu3, Jyoti4, Sunanda Vashisth5, A K Yadav3 and Phool Singh6

1Department of Computer Science, Banasthali Vidyapith, Rajasthan, India.

2Department of Computer Science and Engineering, SoET, Central University of Haryana, Mahendergarh-123 029, India

 3Department of Mathematics, SoBS, Central University of Haryana, Mahendergarh-123 029, India

4Department of Mathematics, Government College Barota, Gohana-131 303, Haryana, India

5School of Engineering and Sciences, G D Goenka University, Gurugram-122103, India

6Department of Applied Sciences and Humanities, SoET, Central University of Haryana, Mahendergarh-123 029, India

Dedicated to Prof Kehar Singh on the occasion of his 84th Birthday on July 3, 2025

The paper proposes a cryptosystem for double color images based on wavelength multiplexing, leveraging indexed images and phase retrieval algorithms. The encryption process begins with the conversion of color images into indexed images, followed by an affine transformation to enhance security. The transformed images are then processed using a phase retrieval algorithm in the Fresnel domain to generate ciphertext, introducing nonlinearity into the cryptosystem. While the encryption process involves a complex setup with phase retrieval algorithms, the decryption is straightforward and computationally efficient, enabling implementation on hybrid systems. The proposed cryptosystem is rigorously evaluated against statistical attacks, noise attacks, and data loss attacks. Simulation results demonstrate its robustness and resilience to these threats. Additionally, the system’s key sensitivity is analyzed, revealing a sufficiently large key space to thwart brute-force attacks. A comparative analysis with existing multi-image encryption schemes highlights the advantages of the proposed cryptosystem, showcasing its superior security against both basic and specialized attacks. This work establishes a secure and efficient framework for double color image encryption, with potential applications in secure communication and data storage. © Anita Publications. All rights reserved.
Doi: 10.54955/AJP.34.7-8.2025.531-542
Keywords: Wavelength Multiplexing, Double Color Images, Indexed Image, Phase Retrieval Algorithm.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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