StegoCore

Python steganography framework designed to hide and extract data inside images using the LSB (Least Significant Bit) technique.

This project is part of a technical cybersecurity portfolio focused on steganography, data hiding techniques, and security tool development.

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What does StegoCore do?

The application allows:

• Hide text messages inside images
• Extract hidden messages
• Hide entire files inside images
• Extract hidden files
• Display progress bars for large payloads
• Use a modular CLI interface

The goal of this project is to demonstrate real-world steganography techniques applied to information security.

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Project Architecture

The project is structured modularly to separate steganography logic from the user interface.

StegoCore/

│

├── core/

│ ├── encoder.py

│ ├── decoder.py

│ ├── file_encoder.py

│ ├── file_decoder.py

│ └── progress.py

│

├── ui/

│ ├── menu.py

│ ├── ui_central.py

│ ├── extractor.py

│ └── image_selector.py

│

├── images/

├── output/

├── screenshots/

│

├── main.py

└── requirements.txt

core/

Contains the steganography engine.

• encoder.py → hide messages
• decoder.py → extract messages
• file_encoder.py → hide files
• file_decoder.py → extract files
• progress.py → progress bar system

ui/

Handles the console interface.

• menu.py → main menu
• ui_central.py → banner / interface
• extractor.py → extraction flow
• image_selector.py → image selection

images/

Test images used as containers.

output/

Generated images containing hidden payloads.

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Steganography Technique

StegoCore uses LSB (Least Significant Bit) steganography.

This technique modifies the least significant bits of pixel values to hide information while keeping the visual appearance of the image unchanged.

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Supported File Types

Because the tool works at binary level, it can hide almost any file type:

txt mp4 pdf zip docx rar xlsx 7z csv exe png bin bmp py gif js mp3 html wav

As long as the payload size fits within the image capacity.

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Important Note about JPG / JPEG

JPEG images must NOT be used as containers.

Reason:

• JPG uses lossy compression
• Compression modifies least significant bits
• Hidden data becomes corrupted

For this reason PNG images are recommended.

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Installation

Clone the repository

git clone https://github.com/Diblock/StegoCore.git

cd StegoCore

Install dependencies

pip install -r requirements.txt

Run the application

python main.py

Security Disclaimer

This tool is intended for educational and research purposes only.

Do not use this software to hide malicious content or perform illegal activities.

Author

Francisco Javier

Cybersecurity • Software Development • Steganography Research

GitHub: https://github.com/Diblock