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Binary Phase-based Optical Encryption System Using the Principle of Interference  

서동환 (경북대학교 전자전기컴퓨터학부)
신창목 (경북대학교 전자전기컴퓨터학부)
김수중 (경북대학교 전자전기컴퓨터학부)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.40, no.1, 2003 , pp. 29-35 More about this Journal
Abstract
In this paper, we propose an improved image decryption system using a phase-encoded image and the principle of interference. An original image and a random image consist of only binary values. The phase-encoded original image is encrypted into a binary phase-only image by multiplying with a phase-encoded random key. Therefore the phase-encoded images have two phase values 0 or $\pi$. The proposed decryption technique is simply performed by interfering between a reference wave and a direct pixel-to-pixel mapping of the encrypted image with a decrypting key. Optical experiments confirmed that the proposed technique is a simple and robust architecture for optical encryption.
Keywords
optical security; interferometer; random phase mask;
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