Imgenc - Secure Steganography App

Imgenc is a powerful and secure steganography tool tailored for Windows. It allows you to hide sensitive text or files inside harmless-looking images using military-grade encryption.

🚀 Features

• Hide Data: Securely embed text messages or arbitrary files inside PNG/BMP images.
• Encrypted: All data is encrypted with AES-256 (derived from your password) before embedding.
• Smart Capacity: Automatically calculates how much data fits in an image.
• Modern UI: Built with Flutter for a sleek, responsive dark-mode interface.
• Cross-Platform Core: Python backend ensures standard cryptographic implementation.

🛠 Tech Stack

• Frontend: Flutter (Windows Desktop)
• Backend: Python (Flask API)
• Security: AES-256 (CBC/GCM), SHA-256 Hashing, Zlib Compression.

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⚡ Quick Start (Windows)

The easiest way to run the app is using the included launcher script, which handles dependencies automatically.

1. Right-click on run_app.ps1 in the project folder.
2. Select "Run with PowerShell".
3. The script will:
   • Install Python dependencies (first run only).
   • Start the local backend server.
   • Launch the Flutter frontend.

Note: You must have Python and Flutter installed and added to your PATH.

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📦 Building for Release

To create a standalone .exe version of the app (portable folder) that you can share:

1. Right-click on build_release.ps1.
2. Select "Run with PowerShell".
3. Wait for the build process to finish.
4. Find your app in the Imgenc_Release/ folder.

You can now zip the Imgenc_Release folder and run it on other Windows machines without needing Flutter installed!

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🔧 Manual Setup

If you prefer to run things manually or are on a different OS:

1. Backend Setup

The backend runs a local Flask server for image processing.

cd backend
# Create virtual env (optional)
python -m venv venv
.\venv\Scripts\activate

# Install requirements
pip install -r requirements.txt

# Run server
python app.py

Server runs at http://127.0.0.1:5000.

2. Frontend Setup

cd frontend
# Get dependencies
flutter pub get

# Run the app
flutter run -d windows

📄 License

MIT License. Free to use and modify.