thatcherclough / StegEmbed

A stenography program that can embed and extract text into and out of the pixels of an image.

StegEmbed

StegEmbed is a stenography program that can embed and extract text into and out of the pixels of an image.

Features

StegEmbed can both embed text into the pixels of an image, and extract previously embedded text from the pixels of an image.

To embed text, StegEmbed:

• Compresses the text.
• Encrypts the text with a given password.
• Uses a pseudo random number generator and a given password to get the pixels to embed the text into.
• Embeds the compressed and encrypted text into the pixels.
• Outputs the embed pixels to a new image.

To extract embedded text, StegEmbed:

• Get the pixels from a given image.
• Uses a pseudo random number generator and a given password as a seed to get the pixels with embedded the text.
• Decrypts the text with a given password.
• Decompresses the text.
• Output the text to a new text file.

Demo

Original image:

Embedded image:

Requirements

• A Java JDK distribution >=8 must be installed and added to PATH.
• The image to be used for embedding/extracting must be a PNG image.

Compatibility

StegEmbed is compatible with Windows, Mac, and Linux.

Installation

# clone StegEmbed
git clone https://github.com/thatcherclough/StegEmbed.git

# change the working directory to StegEmbed
cd StegEmbed

# build StegEmbed with Maven
# for Windows run
mvnw.cmd clean package

# for Linux run
chmod +x mvnw
./mvnw clean package

# for Mac run
sh mvnw clean package

Alternatively, you can download the jar from the release page.

Usage

java -jar stegembed.jar
StegEmbed: A stenography program that can embed and extract text into and out of the pixels of an image (1.0.0)

Usage:
	java -jar stegembed.jar   [-h] [-v] [embed -i IMAGE -t TEXTFILE -p PASSWORD]
				  [extract -i IMAGE -p PASSWORD]
Arguments:
	-h, --help	Display this message.
	-v, --version	Display current version.
	-i, --image	Specify image to use for embedding/extracting.
	-t, --text	Specify text file to use for embedding.
	-p, --password	Specify password to use for encrypting/decrypting when embedding/extracting.

License

• MIT
• Copyright 2020 © Thatcher Clough.