Image Steganography Tool

This Python script allows you to encode any file into a PNG image and decode it back, using steganography techniques. The tool modifies the least significant bits of the image's pixel values to store the data, making the changes imperceptible to the human eye.

Requirements

• Python 3.x
• Pillow (PIL) library

Installation

1. Clone this repository or download the script.
2. Install the required dependencies:

   pip3 install Pillow
   

Usage

Encoding data into an image:

python3 anyFile.py encode <input_file> <output_image.png>

Example:

python3 anyFile.py encode hamlet.txt cat.png

This will encode the contents of hamlet.txt into cat.png. The resulting image will look identical to the original to the human eye.

Decoding data from an image:

python3 anyFile.py decode <input_image.png> <output_file>

Example:

python3 anyFile.py decode cat.png message.txt

This will extract the hidden data from cat.png and save it to message.txt.

How It Works

1. The script converts the input file to binary data.
2. It then modifies the least significant bit of each color channel in each pixel of the PNG image to store this binary data.
3. When decoding, it reads these least significant bits to reconstruct the original file.

Limitations

• Only PNG images are supported due to their lossless compression (BMP and other lossless formats may work).
• The size of the data you can hide is limited to about 3 bits per pixel.

Screenshots

Encoding Process

Decoding Process

Contributing

Feel free to fork this project and submit pull requests with improvements or bug fixes.