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Shift and Noise Tolerance Encryption System Using a Joint Transform Correlator  

서동환 (경북대학교 전자전기컴퓨터학부)
김수중 (경북대학교 전자전기컴퓨터학부)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.40, no.7, 2003 , pp. 499-506 More about this Journal
Abstract
In this paper, we propose the shift and noise tolerance method using a virtual phase image and a joint transform correlator (JTC) architecture that can alleviate the need for an accurate optical axis alignment. An encrypted image is obtained by the Fourier transform of the product of a phase- encoded virtual image to camouflage the original one and a random phase image. Therefore, even if unauthorized users analyze the encrypted image, we can prevent the possibility of counterfeiting from unauthorized people using virtual image which dose not contain any information from the original image. We demonstrate the robustness to noise, to data loss and to shift of the encrypted image using a JTC in the proposed description technique.
Keywords
optical security; joint transform correlator; phase image;
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