Secure Image Steganography App

This is a simple Streamlit app that allows you to encode secret messages into images using LSB (Least Significant Bit) steganography and decode hidden messages from images.

Features

• Encode Message:

  • Upload an image.
  • Enter your secret message.
  • The app encodes the message into the image and provides a download link for the modified image.

• Decode Message:

  • Upload an image with a hidden message.
  • The app decodes and displays the secret message.

Directory Structure

steganography_app/
│── app.py                     # Main Streamlit application
│── requirements.txt           # List of dependencies
│── README.md                  # Project documentation
│
├── images/                    # Contains sample images for testing
│   ├── sample_input.png       # Sample input image (add your own image)
│   ├── encoded_sample.png     # Example of an encoded image (optional)
│
├── utils/
│   └── steganography.py       # Module with encoding/decoding functions
│
└── saved_images/              # Folder to store user-uploaded/processed images (optional)

Setup and Installation

1. Clone the Repository:

   git clone <repository_url>
   cd steganography_app

2. Create a Virtual Environment (optional but recommended):

   python -m venv venv
   source venv/bin/activate   # On macOS/Linux
   venv\Scripts\activate      # On Windows

3. Install Dependencies:

   pip install -r requirements.txt

4. Run the Streamlit App:

   streamlit run app.py

Usage

• Navigate to the Encode Message or Decode Message section from the sidebar.
• Follow the on-screen instructions to upload images and encode or decode messages.

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images/ Folder

Place your sample images (e.g., sample_input.png and optionally encoded_sample.png) in this folder. These images are used for testing and demonstration purposes.

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saved_images/ Folder

This folder is intended for storing user-uploaded or processed images if needed. It can remain empty initially.