Metasurface holographic image obfuscated encryption via two-dimensional discrete hyperchaotic system

Jilong Zhang; Kaiyun Bi

doi:10.1117/12.3038808

17 October 2024 Metasurface holographic image obfuscated encryption via two-dimensional discrete hyperchaotic system

Jilong Zhang, Kaiyun Bi

Author Affiliations +

Proceedings Volume 13289, International Conference on Optical Communication and Optoelectronic Technology (OCOT 2024); 1328906 (2024) https://doi.org/10.1117/12.3038808
Event: The International Conference on Optical Communication and Optoelectronic Technology (OCOT 2024), 2024, Hangzhou, China

Abstract

While metasurface technology provides a novel and more secure method for optical encryption, its constraints in channel capacity and key protection can expose it to the risk of eavesdropping. This paper proposes a novel strategy for metasurface holographic optical image obfuscated encryption based on two-dimensional discrete hyperchaotic system. Initially, a two-dimensional bi-directional feedback hyperchaotic system is constructed, which features exceptional ergodicity, sensitivity to initial conditions, and pseudo-randomness. This system is integrated with the phase structure of the metasurface to effectively generate a phase mask capable of concealing the features of the original image. Subsequently, an association matrix is formed by correlating the phase mask with the hyperchaotic sequence, and the hyperchaotic cipher stream is utilized for permutation and diffusion, significantly enhancing the security and randomness of the encrypted image. Experimental results indicate that the encryption strategy yields ciphertext images with reduced pixel correlation and increased information entropy, which can only be decrypted upon possession of the complete hyperchaotic parameters and at least 70% of the accurate phase information of metasurface.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jilong Zhang and Kaiyun Bi "Metasurface holographic image obfuscated encryption via two-dimensional discrete hyperchaotic system", Proc. SPIE 13289, International Conference on Optical Communication and Optoelectronic Technology (OCOT 2024), 1328906 (17 October 2024); https://doi.org/10.1117/12.3038808

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KEYWORDS

Image encryption

Holography

Holograms

Image processing

Computer security

Polarization

Matrices

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