26 July 2001 Binary image encryption technique and decryption system using joint transform correlator
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Abstract
In this paper a binary image encryption technique and decryption system based on a joint transform correlation are proposed. IN this method, an encrypted image is obtained by multiplying a phase encoded original binary image with a random phase. A Fourier transform of the encrypted, image is used as the encrypted data and a Fourier transform of the random phase is used as the key code. For decryption, the encrypted data is used for one half of the joint input plane, while the key code is used for the other half. After the joint input plane is inverse Fourier transformed, the original binary image can then be reconstructed on a square law device, such as a CCD camera. The proposed encryption technique does not suffer from strong auto-correlation terms appearing in the output plane. In addition, the reconstructed data can be directly transmitted to a digital system for real-time processing. Based on computer simulations, the proposed encryption technique and decoding system were demonstrated as adequate for optical security applications.
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Se-Joon Park, Dong-Hoan Seo, Jong-Yun Kim, Jang-Keun Bae, Chul-Soo Kim, Soo-Joong Kim, "Binary image encryption technique and decryption system using joint transform correlator", Proc. SPIE 4386, Photonic and Quantum Technologies for Aerospace Applications III, (26 July 2001); doi: 10.1117/12.434216; https://doi.org/10.1117/12.434216
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