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    ASIA unversity > 資訊學院 > 資訊工程學系 > 期刊論文 >  Item 310904400/8695

    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/8695

    Title: Optical image cryptosystem based on adaptive steganography
    Authors: Chuang, Cheng-Hung;Lin, Guo-Shiang
    Contributors: Department of Computer Science and Information Engineering
    Keywords: Algorithms;Computer architecture;Image coding;Imaging systems;Random processes;Data embedding;Data hiding;Double-random-phase encoding;Image cryptosystem;Optical security
    Date: 2008-04
    Issue Date: 2010-04-07 21:27:26 (UTC+8)
    Publisher: Asia University
    Abstract: This paper presents a public-key-based optical image cryptosystem with adaptive steganography for practical secure communications. The optical image cryptosystem employs a hybrid architecture for ciphering and deciphering in which double random-phase encoding and asymmetric encryption algorithms are utilized for images and session keys, respectively. The session key is safely protected and transmitted by using an asymmetric encryption algorithm and an adaptive steganographic scheme, respectively. To perform the adaptive steganographic scheme, a sorting technique is used to find the suitable embedding position in the embedding domain, a least-significant-bit truncation algorithm is presented to find the invariant hiding order, and a quantization-based data-embedding algorithm is utilized to hide message bits. Experimental results show that the proposed scheme is superior to that of a previous one due to Lin et al., no matter what embedding domain, quantization level, and message size are used. Especially, compared with the latter scheme a large improvement (22.56 dB) of image quality is achieved by using the proposed adaptive steganographic scheme. © 2008 Society of Photo-Optical Instrumentation Engineers.
    Relation: Optical Engineering 47:047002
    Appears in Collections:[資訊工程學系] 期刊論文

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