Optical Image Encryption Technique Based on Hybrid-pattern Phase Keys

We propose an implementation scheme for an optical encryption system with hybrid-pattern random keys. In the encryption process, a pair of random phase keys composed of a white-noise phase key and a structured phase key are positioned in the input plane and Fourier-spectrum plane respectively. The o...

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Bibliographic Details
Published inCurrent optics and photonics Vol. 2; no. 6; pp. 540 - 546
Main Authors Sun, Wenqing, Wang, Lei, Wang, Jun, Li, Hua, Wu, Quanying
Format Journal Article
LanguageKorean
Published 2018
Subjects
4f correlator
Information security
Optical encryption
Random phase key
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Summary:We propose an implementation scheme for an optical encryption system with hybrid-pattern random keys. In the encryption process, a pair of random phase keys composed of a white-noise phase key and a structured phase key are positioned in the input plane and Fourier-spectrum plane respectively. The output image is recoverable by digital reconstruction, using the conjugate of the encryption key in the Fourier-spectrum plane. We discuss the system encryption performance when different combinations of phase-key pairs are used. To measure the effectiveness of the proposed method, we calculate the statistical indicators between original and encrypted images. The results are compared to those generated from a classical double random phase encoding. Computer simulations are presented to show the validity of the method.
Bibliography:KISTI1.1003/JNL.JAKO201809242560045
ISSN:2508-7266
2508-7274