Stego-CLI App

What is Stegonography?

Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video (from Wikipedia).

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This app allows both injecting and extracting text messages into/from a given PNG image (a 'carrier').

Build With

• PIL - a Python Imaging Library
• Numpy - a powerful package for scientific computing and working with N-dimensional arrays

Requirements

• python (2.6.X and later)

Installing

Using git clone:

git clone https://github.com/ofir1080/stegonography-cli-app.git

Running App

python StegoApp.py

Project Structure

Modules

• inject.py - responsible for injecting a given message into the carrier image represented by a Numpy 3-d array
• extract.py - responsible for extracting the concealed message from a given carrier

Class Objects

• Carrier - 3-d Numpy array of shape (height, width, 3) where 3 is for RGB format.
• BitMsg - 1-d Numpy array consisted of zeros and ones representing the message as bits. Before the conversion the character 'ÿ' is concatenated in order to mark where the end of the message is.

Project Diagram

How does it work?

Authors

Ofir Abramovich