Experimental multiplexing approach via code key rotations under a joint transform correlator scheme

Rueda, Édgar; Ríos, Carlos A.; Barrera, John Fredy; Henao, Rodrigo; Torroba, Roberto

doi:10.1016/j.optcom.2011.01.052

Cited by 20 publications

(13 citation statements)

References 11 publications

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“…Figure 2c, d shows the decrypted binary images that were obtained by performing the "perfect" decryption process, i.e., without wavelength, propagation, and random phase mask errors. To evaluate the image quality, the twodimensional (2D) cross-correlation was calculated between both pairs of original and decrypted images as follows (Situ and Zhang 2004;Rueda et al 2011). …”

Section: Optical Encryption Of Multiple Images and Imbalance In The Imentioning

confidence: 99%

“…Optical encryption technologies have been extended through the emergence of various multiplexing schemes, including wavelength multiplexing (Situ and Zhang 2005), spatial shifting (Situ and Zhang 2006;Fredy Barrera et al 2006), low-correlation phase masks (Rueda et al 2011), modulated amplitude masks (Barrera et al 2006a), and polarization multiplexing (Barrera et al 2006b). …”

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confidence: 99%

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Crosstalk analysis for multiple-image encryption and image-quality equalization technology

et al. 2015

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We report a crosstalk analysis method for multiple-image encryption, which focuses on the individual effects of different multiplexed images in the crosstalk noise. The different noise characteristics are analyzed using a simulation model for each image. Using the resulting crosstalk noise characteristics, we can explain the differences in the quality of multiplexed images that cannot be explained using conventional approaches. Furthermore, we describe a simple image-modulation method to compensate for differences in image quality. We then experimentally show that using the image-modulation technique, we can significantly reduce the variation in image quality within a set of images. This technique leads to improvements in the quality of the poorest images in the set.

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Section: Optical Encryption Of Multiple Images and Imbalance In The Imentioning

confidence: 99%

mentioning

confidence: 99%

Crosstalk analysis for multiple-image encryption and image-quality equalization technology

et al. 2015

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“…This master key will be an additional security coding-mask when included in a conventional JTC encrypting architecture. In order to probe the potentiality of this new concept, in the next sections we will develop the optodigital procedure to carry out an encrypting protocol using the concept of master key; next we present two applications of the master key in a multiplexing procedure [17] and a subsampling technique [18].…”

Section: Master Keymentioning

confidence: 99%

“…We include a theoretical supporting section, along with a technical description of the method. Finally, we present two practical applications in encryption: one in a multiplexing process [17] and the other in a subsampling operation [18].…”

Section: Introductionmentioning

confidence: 99%

Master key generation to avoid the use of an external reference wave in an experimental JTC encrypting architecture

et al. 2012

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In experimental optodigital encrypting architectures, the use of a reference wave is essential. In this contribution, we present an experimental alternative to avoid the reference wave during the encrypting procedure in a joint transform correlator architecture by introducing the concept of a master key. Besides, the master key represents an additional security element for the entire protocol. In our method, the master key is holographically processed and used during the encryption process with the encrypting key. We give the mathematical description for the process in case of a single input object and then we extend it to multiple input objects. We present the experimental demonstration of the proposed method including two examples where this technique is successfully applied for several input objects.

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“…However, additional hardware is mandatory within certain systems, for example, multiplexing systems using multiple-wavelength illumination require multiple light source which may increase the system complexity and cost. Furthermore, mechanical or manual movements such as rotation multiplexing [13], angular multiplexing [14] etc. are unavoidable in some multiplexing techniques.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional polarization marked multiple-QR code encryption by optimizing a single vectorial beam

Lin

Shen

Hua

et al. 2015

Optics Communications

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Experimental multiplexing approach via code key rotations under a joint transform correlator scheme

Cited by 20 publications

References 11 publications

Crosstalk analysis for multiple-image encryption and image-quality equalization technology

Crosstalk analysis for multiple-image encryption and image-quality equalization technology

Master key generation to avoid the use of an external reference wave in an experimental JTC encrypting architecture

Three-dimensional polarization marked multiple-QR code encryption by optimizing a single vectorial beam

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