Design and implementation of an optical joint transform encryption system using complex-encoded key mask

Chiung Liang Chen, Li Chien Lin, Chau Jern Cheng

    研究成果: 雜誌貢獻文章同行評審

    10 引文 斯高帕斯(Scopus)

    摘要

    We investigate the practical design of a complex-encoded key mask for optical encryption and decryption based on joint transform correlation architecture. The mask is created by using two coupled liquid-crystal spatial light modulators, one operating in amplitude mode and the other in phase mode. We develop a modified iterative Fourier transformation algorithm to design an optimal complex key mask, which is applied and mapped to the complex modulation of the liquid-crystal devices for optical implementation. The limitations of the devices on the system design are investigated and analyzed. The width constraints of the key mask are also derived, based on the joint transform correlation architecture for optical realization. Experimental results show the decryption performance and the shift-invariance of the complex key mask.

    原文英語
    文章編號068201
    期刊Optical Engineering
    47
    發行號6
    DOIs
    出版狀態已發佈 - 2008 十二月 1

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics
    • Engineering(all)

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