Steganography is the practice of hiding secret information within ordinary, non-secret data or a physical object to avoid detection. Unlike encryption, which makes data unreadable, steganography hides the very existence of the secret message.

The word comes from the Greek words:

• Steganos = "covered" or "hidden"
• Graphein = "writing"

Steganography has been used throughout history:

• Ancient Greece: Messages were tattooed on shaved heads of slaves, then hidden under regrown hair
• World War II: Invisible ink and microdots were used to pass secret messages
• Modern Day: Digital steganography hides data in images, audio files, and video

This tool uses LSB (Least Significant Bit) steganography, which works by:

1. Converting the secret message to binary (1s and 0s)
2. Replacing the least significant bit of each color channel (R, G, B) in image pixels
3. Since changing the LSB only alters the color value by 1 (out of 256), the change is imperceptible to the human eye

Original pixel:  R=156, G=200, B=100
Binary:          R=10011100, G=11001000, B=01100100
                           ^          ^          ^
                         LSB        LSB        LSB

After hiding '101':
Binary:          R=10011101, G=11001000, B=01100101
New pixel:       R=157, G=200, B=101

The difference between RGB(156, 200, 100) and RGB(157, 200, 101) is invisible to the naked eye!

• 🌙 Modern Dark Mode GUI - Beautiful interface using CustomTkinter
• 🔒 Hide Messages - Encode secret text into PNG images
• 🔓 Reveal Messages - Extract hidden messages from encoded images
• 📁 Easy File Selection - Browse and select images with a simple dialog
• ✅ Input Validation - Clear error messages for invalid inputs
• 💾 Lossless Output - Saves encoded images as PNG to preserve data
• 🎨 User-Friendly Design - Intuitive interface for both beginners and advanced users

• Python 3.8 or higher
• pip (Python package installer)

git clone https://github.com/Ilias1988/Steganography-Tool.git
cd Steganography-Tool

pip install -r requirements.txt

python stego_tool.py

1. Launch the application by running python stego_tool.py
2. Click "Browse" to select a PNG image (this will be your "carrier" image)
3. Type your secret message in the text box
4. Click "🔒 Hide Data"
5. Choose where to save the encoded image
6. Done! Your message is now hidden inside the new image

1. Launch the application
2. Click "Browse" to select an encoded PNG image
3. Click "🔓 Reveal Data"
4. The hidden message will appear in the text box

┌──────────────────────────────────────────────────────┐
│           🔐 Steganography Tool                       │
│        Hide secret messages inside images            │
├──────────────────────────────────────────────────────┤
│  📁 Select Image:                                    │
│  ┌────────────────────────────────┐  ┌──────────┐   │
│  │ C:/images/photo.png           │  │  Browse  │   │
│  └────────────────────────────────┘  └──────────┘   │
├──────────────────────────────────────────────────────┤
│  ✉️ Secret Message:                                  │
│  ┌────────────────────────────────────────────────┐ │
│  │                                                │ │
│  │  Your secret message goes here...             │ │
│  │                                                │ │
│  └────────────────────────────────────────────────┘ │
├──────────────────────────────────────────────────────┤
│     ┌──────────────┐      ┌──────────────┐          │
│     │ 🔒 Hide Data │      │ 🔓 Reveal    │          │
│     └──────────────┘      └──────────────┘          │
├──────────────────────────────────────────────────────┤
│  ✅ Ready - Select an image to begin                │
└──────────────────────────────────────────────────────┘

Steganography-Tool/
│
├── stego_tool.py       # Main application with GUI and steganography logic
├── requirements.txt    # Python dependencies
└── README.md          # This file

• Input: PNG images (recommended for best results)
• Output: PNG format (lossless compression preserves hidden data)

⚠️ Important: Do not use JPEG or other lossy formats! Compression will destroy the hidden data.

The maximum message size depends on the image dimensions:

• Formula: max_characters = (width × height × 3) / 8
• Example: A 1920×1080 image can hide approximately 777,600 characters

This tool is provided for educational and legitimate purposes only.

1. Educational Use: This tool is designed to demonstrate steganography concepts and techniques for learning purposes.

2. Authorized Use Only: Only use this tool on images you own or have explicit permission to modify.

3. No Illegal Activities: Do not use this tool for:

   • Hiding illegal content
   • Evading security measures
   • Any malicious purposes
   • Violating privacy laws

4. No Warranty: This software is provided "as is" without warranty of any kind. The authors are not responsible for any misuse or damage caused by this tool.

5. Compliance: Users are responsible for ensuring their use of this tool complies with all applicable local, state, national, and international laws.

• Be transparent about your use of steganography when appropriate
• Respect others' privacy and intellectual property
• Use this knowledge responsibly

Contributions are welcome! Feel free to:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

This project is licensed under the MIT License - see the LICENSE file for details.

Ilias

• GitHub: @Ilias1988

• CustomTkinter for the beautiful modern GUI library
• Pillow for excellent image processing capabilities
• The cybersecurity community for inspiring this educational project