sTego

ste·ga·no·graph·y The practice of concealing messages or information within other nonsecret text or data.

sTego is a command line application built on JavaScript & Node.js to hide and reveal files from within images using LSB steganography (in tandem with AES-256-CTR encryption for that extra kick).


What does that mean? Do you want to send secret messages to a backdoor friend, but you're afraid of it being deciphered?

Hide your commands messages within a harmless image and let it breeze past their suspicions.

Cool! Who built it? It was built by a cool BTECH Network Security Student named @TRatnayake for the COMP 8505 course at BCIT.

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Requirements & Limitations

1. Node.js version 0.12 or higher
2. Cover image must be a .bmp

Usage

You can use sTego in two ways, either via command line arguments (if you're a pro h4x0r) or via prompts.

First install dependencies npm install

1. Command Line Arguments: Hiding An Image Format: node dcstego.js <embedFile> <coverImage> <outputFile> <encryptionKey> Example: node dcstego.js text.txt ./images/coverImage.bmp secretImage.bmp password

   Revealing An Image Format: node dcstego.js <secretFilePath> <decryptionKey> Example: node dcstego.js secretImage.bmp password

2. Prompts: Hiding An Image node dcstego

Features

• Encryption! All messages are further encrypted using AES-256-CTR provided by the node.js CRYPTO module.
• Amazing Efficiency! You can store 3 bits of information for each pixel in a cover image!
• Cool Prompts! Multi-coloured terminal prompts, so you don't get confused by a non GUI interface

To-Do