This paper presents a novel Mod-4 steganographic method in discrete cosine transform (DCT) domain. A group of 2 /spl times/ 2 quantized DCT coefficients (GQC) is selected as the valid embedding area if more than two DCT coefficients are outside the interval of [-1,1]. The modulo 4 arithmetic operation is further applied to all the valid GQCs to embed a pair of binary bits using the shortest-route modification scheme. Each secret message is also encrypted to provide the system with more security. The proposed system has been extensively tested on a variety of images with different textures. Experimental results demonstrate that our system successfully preserves the quality of the images and stays undetected by the well-known steganalysis methods.


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    Titel :

    An adaptive DCT-based Mod-4 steganographic method


    Beteiligte:
    Xiaojun Qi, (Autor:in) / KokSheik Wong, (Autor:in)


    Erscheinungsdatum :

    01.01.2005


    Format / Umfang :

    614946 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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