Optical triple random phase encryption
Ahouzi, Esmail (Institut National des Postes et Telecommunications (Marroc))
Zamrani, Wiam (Institut National des Postes et Telecommunications (Marroc))
Azami, Nawfel (Institut National des Postes et Telecommunications (Marroc))
Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física)
Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
Yzuel Giménez, María Josefa (Universitat Autònoma de Barcelona. Departament de Física)

Date:	2017
Abstract:	We propose an optical security technique for image encryption using triple random-phase encoding (TRPE). In the encryption process, the original image is first double-random-phase encrypted. The obtained function is then multiplied by a third random-phase key in the output plane, to enhance the security level of the encryption process. This method reduces the vulnerability to certain attacks observed when using the conventional double random-phase encoding (DRPE). To provide the security enhancement of the proposed TRPE method, three attack cases are discussed: chosen-plaintext attacks, known-plaintext attacks, and chosen-ciphertext attacks. Numerical results are presented to demonstrate feasibility and effectiveness of the proposed method. Compared with conventional DRPE, the proposed encryption method can provide an effective alternative and has enhanced security features against the aforementioned attacks.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Image encryption ; Cryptanalysis ; Double random phase encoding ; Optical security
Published in:	Optical engineering, Vol. 56, issue 11 (Nov. 2017) , p. 113114-1-8, ISSN 0091-3286

DOI: 10.1117/1.OE.56.11.113114

Post-print 27 p, 1.1 MB

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