mgiaramita / image-message

Image Steganography in Python.

Image-Message

Custom LSD (Least Significant Digit) Steganography algorithm that can encode 1 character per pixel.

How:

pixel data: (Red, Green, Blue) values 0-255

character: int value 0-255

char 'f' has an ascii value of 102

If the pixel we want to encode this char in has the RGB values (156, 222, 000)

Split 102 into three seperate digits 1  0  2. 

Replace the least significant digit in the respective color channel with these values.

So we end up with a new pixel containing the values (151, 220, 002)

Starting Pixel: (156, 222, 000) Byte to incode: 102 Encoded Pixel: (151, 220, 002)

Usage:

python ImageMessage.py -e [imagename] [message.txt]  (encode message)
python ImageMessage.py -d [imagename] [output.txt]   (decode message)

Example:

Original Image (400x400)

Output containing the entirety of Shakespeare's Romeo and Juliet

How to install:

• Install the latest version of Python 3.
• Install Pillow (Latest Python Image Library).
• Clone the repo.