Multi-user multiplexed scheme for decoding modulated-encoded sequential information

ABSTRACT: Encrypting procedures with multiplexed operations exhibit an inherent noise. We presented options to avoid background noise arising from the non-decoded images. We have a coding mask corresponding to each single input object, thus resulting in a static decrypting mechanism. Besides, if we...

Full description

Autores:
Mosso, Fabian
Tebladi, Myrian Cristina
Barrera Ramírez, John Fredy
Bolognini, Néstor Alberto
Torroba, Roberto Daniel
Tipo de recurso:
Article of investigation
Fecha de publicación:
2011
Institución:
Universidad de Antioquia
Repositorio:
Repositorio UdeA
Idioma:
eng
OAI Identifier:
oai:bibliotecadigital.udea.edu.co:10495/8136
Acceso en línea:
http://hdl.handle.net/10495/8136
Palabra clave:
Encriptación óptica
Seguridad óptica
Multiplexación
Rights
openAccess
License
Atribución-NoComercial-SinDerivadas 2.5 Colombia
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dc.title.spa.fl_str_mv Multi-user multiplexed scheme for decoding modulated-encoded sequential information
title Multi-user multiplexed scheme for decoding modulated-encoded sequential information
spellingShingle Multi-user multiplexed scheme for decoding modulated-encoded sequential information
Encriptación óptica
Seguridad óptica
Multiplexación
title_short Multi-user multiplexed scheme for decoding modulated-encoded sequential information
title_full Multi-user multiplexed scheme for decoding modulated-encoded sequential information
title_fullStr Multi-user multiplexed scheme for decoding modulated-encoded sequential information
title_full_unstemmed Multi-user multiplexed scheme for decoding modulated-encoded sequential information
title_sort Multi-user multiplexed scheme for decoding modulated-encoded sequential information
dc.creator.fl_str_mv Mosso, Fabian
Tebladi, Myrian Cristina
Barrera Ramírez, John Fredy
Bolognini, Néstor Alberto
Torroba, Roberto Daniel
dc.contributor.author.none.fl_str_mv Mosso, Fabian
Tebladi, Myrian Cristina
Barrera Ramírez, John Fredy
Bolognini, Néstor Alberto
Torroba, Roberto Daniel
dc.subject.none.fl_str_mv Encriptación óptica
Seguridad óptica
Multiplexación
topic Encriptación óptica
Seguridad óptica
Multiplexación
description ABSTRACT: Encrypting procedures with multiplexed operations exhibit an inherent noise. We presented options to avoid background noise arising from the non-decoded images. We have a coding mask corresponding to each single input object, thus resulting in a static decrypting mechanism. Besides, if we manage the spatial destination of each decoded output, then we avoid the noise superposition. In those schemes, the displaying output order was irrelevant. However, when we face a sequence of events including multi-users, we need to develop another strategy. We present a multi-user encrypting scheme with a single encoding mask that removes the background noise, also showing the decrypted data in a prescribed sequence. The multiplexing scheme is based on the 4f double random phase encryption architecture and a theta modulation method, which consists in superposing each encrypted information with a determined sinusoidal grating. Afterwards we proceed to the completely encoded data multiplexing. In a multi-user scheme, we employ different encrypting masks in the 4f optical setup for each user, and the same mask is employed for the user sequence. We store the encrypted data in the single medium. After a Fourier transform operation and an appropriate filtering procedure, we reach the sequence of isolated encrypted spots corresponding to the right user. With the aid of the pertaining decoding mask, the user can decrypt the sequence. We avoid the noise by the appropriate choice of the modulating gratings pitch as to elude the overlapping of spots at the Fourier plane, which is the cause of information degradation.
publishDate 2011
dc.date.issued.none.fl_str_mv 2011
dc.date.accessioned.none.fl_str_mv 2017-09-06T16:58:22Z
dc.date.available.none.fl_str_mv 2017-09-06T16:58:22Z
dc.type.spa.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.citation.spa.fl_str_mv Mosso, F., Tebaldi, M. C., Barrera Ramírez, J. F., Bolognini, N. A., & Torroba, R. D. (2011). Multi-user multiplexed scheme for decoding modulated-encoded sequential information. Proceedings of SPIE. 8011, 801173-1/801173-10.
dc.identifier.issn.none.fl_str_mv 0277-786X
dc.identifier.uri.none.fl_str_mv http://hdl.handle.net/10495/8136
dc.identifier.doi.none.fl_str_mv 10.1117/12.902124
dc.identifier.eissn.none.fl_str_mv 1996-756X
identifier_str_mv Mosso, F., Tebaldi, M. C., Barrera Ramírez, J. F., Bolognini, N. A., & Torroba, R. D. (2011). Multi-user multiplexed scheme for decoding modulated-encoded sequential information. Proceedings of SPIE. 8011, 801173-1/801173-10.
0277-786X
10.1117/12.902124
1996-756X
url http://hdl.handle.net/10495/8136
dc.language.iso.spa.fl_str_mv eng
language eng
dc.rights.*.fl_str_mv Atribución-NoComercial-SinDerivadas 2.5 Colombia
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eu_rights_str_mv openAccess
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dc.publisher.spa.fl_str_mv Society of Photo-optical Instrumentation Engineers
institution Universidad de Antioquia
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spelling Mosso, FabianTebladi, Myrian CristinaBarrera Ramírez, John FredyBolognini, Néstor AlbertoTorroba, Roberto Daniel2017-09-06T16:58:22Z2017-09-06T16:58:22Z2011Mosso, F., Tebaldi, M. C., Barrera Ramírez, J. F., Bolognini, N. A., & Torroba, R. D. (2011). Multi-user multiplexed scheme for decoding modulated-encoded sequential information. Proceedings of SPIE. 8011, 801173-1/801173-10.0277-786Xhttp://hdl.handle.net/10495/813610.1117/12.9021241996-756XABSTRACT: Encrypting procedures with multiplexed operations exhibit an inherent noise. We presented options to avoid background noise arising from the non-decoded images. We have a coding mask corresponding to each single input object, thus resulting in a static decrypting mechanism. Besides, if we manage the spatial destination of each decoded output, then we avoid the noise superposition. In those schemes, the displaying output order was irrelevant. However, when we face a sequence of events including multi-users, we need to develop another strategy. We present a multi-user encrypting scheme with a single encoding mask that removes the background noise, also showing the decrypted data in a prescribed sequence. The multiplexing scheme is based on the 4f double random phase encryption architecture and a theta modulation method, which consists in superposing each encrypted information with a determined sinusoidal grating. Afterwards we proceed to the completely encoded data multiplexing. In a multi-user scheme, we employ different encrypting masks in the 4f optical setup for each user, and the same mask is employed for the user sequence. We store the encrypted data in the single medium. After a Fourier transform operation and an appropriate filtering procedure, we reach the sequence of isolated encrypted spots corresponding to the right user. With the aid of the pertaining decoding mask, the user can decrypt the sequence. 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