trojanzaro / java-lsb-steg

A 32 Bit Bitmap LSB steganography implementation in Java

java-lsb-steg

A 32 Bit Bitmap LSB steganography implementation in Java

Any image of X * Y pixels can be represented as a 32 bit bitmap

Pixel:

 A(lpha)   R(ed)   G(reen)  B(lue)
10010101 01101010 01010110 01011001

Since we can nibble a nibble into two bits

byte: 01100110
nibble: 0110 0110
nibble nibble: 01 10 01 10

we can replace the last two bits of every channel, (red green blue and alpha) with the bits of a single byte. If we do that for every byte of a single file we can hide a file inside an image so long as the image has a capacity of:

X * Y bytes

To compile:

javac *.java

To hide a file into an image:

java MainClass -h

To extract hidden info from file:

java MainClass -e

Since all of the data required to extract the information can be abstracted the program can be altered to retrieve the size of the hidden info another way