Abstract

An image encryption method combining the joint transform correlator (JTC) architecture with phase-shifting interferometry to realize double random-phase encoding is proposed. The encrypted field and the decrypting key are registered as holograms by phase-shifting interferometry. This method can encrypt two images simultaneously to improve the encryption efficiency of the methods based on JTC architecture, and eliminate the system alignment constraint of the methods based on Mach-Zehnder interferometer (MZI) architecture. Its feasibility and validity are verified by computer simulations. Moreover, image encryption and decryption can be achieved at high speed optically or digitally. The encrypted data are suitable for Internet transmission.

© 2007 Chinese Optics Letters

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Acta Opt. Sin. (in Chinese) (1)

B. Yu and X. Peng, Acta Opt. Sin. (in Chinese) 25, 881 (2005).

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Chin. J. Lasers (in Chinese) (1)

Y.-Y. Wang, Y.-R. Wang, and Y.-B. Yang, Chin. J. Lasers (in Chinese) 33, 1360 (2006).

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A. E. Shortt, T. J. Naughton, and B. Javidi, Proc. SPIE 5908, 590811 (2005).

S. K. Gil, S. H. Jeon, N. Kim, and J. R. Jeong, Proc. SPIE 6136, 613615 (2006).

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