🎧 Podcast Cloud Platform

A simple cloud-based podcast platform built using Python. It features a Streamlit frontend (app.py) and an aiohttp backend (server.py) for handling secure podcast uploads, downloads, verification, and history tracking.

✨ Features

• Upload Podcast: Upload an MP3 file (podcast.mp3) with AES-GCM encryption and RSA signature generation.
• Stream Podcast: Securely stream the uploaded podcast directly from the platform.
• Verify Integrity: Verify the integrity of the podcast using cryptographic signatures and hashes.
• Upload History: View a history of uploaded files with detailed metadata and timestamps.

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📦 Prerequisites

• Python 3.8+
• Required Python packages:
  • streamlit
  • requests
  • aiohttp
  • cryptography

Install all dependencies using:

pip install streamlit requests aiohttp cryptography

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⚙️ Setup Instructions

1. Clone the Repository

git clone <repository-url>
cd <repository-directory>

2. Install Dependencies

pip install -r requirements.txt

Or install manually using the command above.

3. Run the Backend Server

Start the aiohttp server:

python server.py

• Server will run at: http://localhost:8888

4. Run the Frontend Application

Start the Streamlit app:

streamlit run app.py

• App will be available at: http://localhost:8501

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🚀 Usage

🔼 Upload a Podcast

1. Open the app in your browser.
2. Upload a file named podcast.mp3.
3. Click Upload to securely encrypt and send it to the server.
4. Metadata (file name, hash, nonce, key, signature, timestamp) will be displayed.

▶️ Stream a Podcast

• Click Load and Play Podcast to download and stream the uploaded file.

🛡️ Verify Integrity

• Click Check File Integrity to verify the file's authenticity using its hash and signature.

📚 View Upload History

• The Upload History section displays all uploads with timestamps.

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🗂️ Project Structure

├── app.py                # Frontend: Streamlit interface
├── server.py             # Backend: aiohttp API server
├── cloud_storage/        # Directory for encrypted files, metadata, and upload history
│   ├── podcast_encrypted.bin
│   ├── metadata.json
│   ├── upload_history.json

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🔐 Security Features

• AES-GCM Encryption: Podcast files are encrypted with a randomly generated key and nonce.
• RSA Signatures: Metadata is signed using RSA and SHA-512 for integrity verification.
• SHA-256 Hashing: Used to ensure file integrity.

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⚠️ Notes

• The backend server must be running before using the frontend.
• Only files named podcast.mp3 are accepted.
• A single encrypted file and its metadata are stored at a time.
• Upload history is tracked in upload_history.json.

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🛠️ Troubleshooting

• Server not responding: Ensure the backend is running at http://localhost:8888.
• Upload errors: Confirm the file is named podcast.mp3 and is a valid MP3 file.
• Dependency issues: Check that all required packages are installed.

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📄 License

This project is licensed under the MIT License.