Focus-tunable experimental optical cryptosystem

Jaramillo-Osorio, John Alexis; Torres-Sepúlveda, Walter; Velez-Zea, Alejandro; Mira-Agudelo, Alejandro; Barrera-Ramírez, John Fredy; Torroba, Roberto

doi:10.1016/j.optlastec.2021.107689

Cited by 5 publications

(4 citation statements)

References 51 publications

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“…More recently, the JFrTC was implemented for the first time in an architecture of a focus-tunable optical cryptosystem, with the aid of an electrically focus-tunable lens (EFTL) [ 89 ]. The fractional order of the fractional Fourier transform was also used here as a security parameter and the EFTL enabled its faster control as compared to mechanical solutions.…”

Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

“…The processes of encryption and decryption were achieved with a wide range of values for the focal length of the EFTL and, based on these variations, a multi-user protocol was proposed. The system was validated by both simulations and experimental results [ 89 ]. A JTC encryption system, based on the Collins diffraction transform (CDT), was recently proposed [ 31 ].…”

Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

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Optical Correlators for Cryptosystems and Image Recognition: A Review

Drăgulinescu

2023

Sensors

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Optical correlators are efficient optical systems that have gained a wide range of applications both in image recognition and encryption, due to their special properties that benefit from the optoelectronic setup instead of an all-electronic one. This paper presents, to the best of our knowledge, the most extensive review of optical correlators to date. The main types are overviewed, together with their most frequent applications in the newest contributions, ranging from security uses in cryptosystems, to medical and space applications, femtosecond pulse detection and various other image recognition proposals. The paper also includes a comparison between various optical correlators developed recently, highlighting their advantages and weaknesses, to gain a better perspective towards finding the best solutions in any specific domain where these devices might prove highly efficient and useful.

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Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

Section: Recent Applications and Implementations Of Optical Correlatorsmentioning

confidence: 99%

Optical Correlators for Cryptosystems and Image Recognition: A Review

Drăgulinescu

2023

Sensors

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“…Mathematically, both the encryption and decryption processes within the SLP JTC cryptosystem variant can be described using the fractional Fourier transform (FrFT), motivating some groups to call this JTC variant as 'fractional JTC cryptosystem' [22,23,25]. Additionally, the FrFT can also be applied to solve the FSP JTC cryptosystem variant, as the FDI can be addressed using a FrFT [26,27].…”

Section: Introductionmentioning

confidence: 99%

Application of the fractional Fourier transform for decryption in experimental optical cryptosystems

Vargas-Castrillon,

Velez-Zea,

Barrera-Ramírez

2024

J. Opt.

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In this contribution, we introduce a new practical approach to apply the fractional Fourier transform in the modelling of two optical systems: free space propagation and a single lens processor. This formulation presents a simple way to stablish a direct relationship between physical parameters of the two optical systems and a real-valued fractional order. Furthermore, we employ and compare two numerical methods for evaluating the fractional Fourier transform: the convolution and the Fresnel transform. Consequently, we apply this innovative approach to the digital decryption process in an opto-digital joint transform correlator cryptosystem, considering both the free space propagation and the single lens processor variants. We analyse both numerically and experimentally encrypted data to support our proposed method and to investigate the sensitivity of the decryption process with the fractional order. Notably, we obtain similar decryption results for both numerically and experimentally encrypted objects, demonstrating excellent agreement between the theoretical model, the numerical test, and the experiment.

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“…Además, en la literatura especializada se pueden encontrar muchas contribuciones que proponen diferentes sistemas ópticos para llevar a cabo procesos de protección de datos, entre las que se destacan los que usan la arquitectura 4f ( Barrera-Ramírez, et al, 2005a;Barrera-Ramírez, et al, 2005b;Javidi, et al, 1996;Mosso, et al, 2011a), los de correlador de transformada conjunta (joint transform correlator, JTC) en el dominio de Fourier (Nomura & Javidi, 2000;Velez-Zea, et al, 2018), los de Fresnel ( Barrera-Ramírez, et al, 2016;Jaramillo-Osorio, et al, 2022b;Vilardy, et al, 2014) y los de transformada fraccional (Jaramillo-Osorio, et al, 2018;Jaramillo-Osorio, et al, 2022a). Otras variantes incluyen el procesamiento mediante otras transformadas, entre ellas, la de Hartley (Chen & Zhao, 2006), la giratoria (Liu, et al, 2010;Vilardy, et al, 2017), la de Arnold (Shi, et al, 2011), la de Mellin (Zhou, et al, 2015), la jigsaw (Vilardy, et al, 2019a), y la de Collins (Vilardy, et al, 2019b).…”

Section: Introductionunclassified

Encriptación de información mediante procesamiento óptico

Barrera-Ramírez

2022

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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En esta contribución se discuten los avances más significativos en el campo de la encriptación de información mediante procesamiento óptico con énfasis en los adelantos en la reducción y la eliminación del ruido. Se hace la descripción teórica de un sistema de encriptación compacto y se presentan los resultados de su implementación experimental. Además, se demuestra que la inclusión de contenedores de información personalizados permite la protección de la información y su recuperación libre de ruido, evidenciando el potencial del sistema de seguridad compacto. Por último, se presentan las perspectivas en el área de investigación.

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Focus-tunable experimental optical cryptosystem

Cited by 5 publications

References 51 publications

Optical Correlators for Cryptosystems and Image Recognition: A Review

Optical Correlators for Cryptosystems and Image Recognition: A Review

Application of the fractional Fourier transform for decryption in experimental optical cryptosystems

Encriptación de información mediante procesamiento óptico

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