LSB Steganography Tool

A tool built with python and Pillow that uses the least significant bits of an image to encode a message

Features

• Encode a message: encode a message into an image by modifying the least significant bits of the image's pixels.
• Decode a message: decode a message from an image.

Requirements

• Python 3.x
• Pillow library for image manipulation

Installation

Install the required dependencies (just pillow):

pip install -r requirements.txt

Usage

Encoding:

python3 stego.py encode <message> <image_path> <output_path>

Decoding:

python3 stego.py decode <image_path>

Arguments:

• <message>: The text message to encode.
• <image_path>: Path to the input image file.
• <output_path>: Path to save the image with the encoded message.

Example:

python3 stego.py encode "Hello, World!" input.png output.png

Notes

• Doesn't work with jpeg images due to lossy compression
• Made to work with png images, but can probably work for others
• The image needs enough pixels to store the message. Since a pixel can store 3 bits of a message; (len(message) * 8) / 3 = #pixels needed
• The longer the message, the easier it will be to detect encoding

Disclaimer

This tool is for educational purposes only. Use responsibly and ensure compliance with applicable laws and regulations.