Shift-tolerance property of fully phase encryption that uses a joint transform correlator |
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Authors: | Seo Dong-Hoan Shin Chang-Mok Kim Soo-Joong |
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Affiliation: | School of Electrical Engineering and Computer Science, Kyungpook National University 1370 Sangyuk-Dong, Buk-Gu, Daegu, 702-701, Korea. dhseo@bada.hhu.ac.kr |
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Abstract: | We technically investigate the robustness of an image encryption technique that uses a virtual phase image and a joint transform correlator (JTC) in the frequency domain. An encrypted image is obtained by the Fourier transform of the product of a virtual phase image, which camouflages the original image, and a random phase image. The resulting image is then decrypted by use of a decrypting key made from the proposed phase assignment rule in order to enhance the level of security. We demonstrate that the encrypted image generated by the proposed JTC-based decryption technique is robust to data loss and image shift. |
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