stegnograhpy project hiding the data in images.

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Windows

JavaSE

JavaSE6

public static final int OFFSET_JPG= 3;
    public static final int OFFSET_PNG= 42;
    public static final int OFFSET_GIF_BMP_TIF= 32;

i got source code in that removing some offset values before hiding the data in to images(carrier image).

description of the project. how they are hiding the data if possible can u briefly explain....

My email id : [EMAIL ADDRESS REMOVED]

/*** Header description: *** In bytes: (4)+ 3+ 1+ 1+ 4= 2+ 9 Bytes. (*4 - for every 1 byte in () as every 4 bytes of of master file contain 2 bits)
* 2 bytes representing the size of the actual file
* 3 bytes indicate the version of the software used to embed message eg. 2 0 0
* 1 Byte1 (4 actual bits) incicates features used which include file Compression, Encryption, Message/File
* 1 byte contains the compression ratio
* 4 bytes Contain the size of the data (A 32 bit integer value)
***/