🔐 SecureCrypt – Streamlit-Based Encryption System

Welcome to SecureCrypt – an interactive, browser-based encryption and decryption platform built with Streamlit.
This system allows users to securely perform random and pseudo-random key-based XOR encryption on both image and text files, and compare their security characteristics.

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🚀 Project Overview

SecureCrypt provides a hands-on playground for understanding how cryptographic key generation affects data security.
With support for both truly random and deterministically generated (pseudo-random) keys, this system lets users:

• 🔐 Encrypt/Decrypt files with full control
• 📊 Analyze key entropy and encryption time
• 📈 Compare security outcomes visually and statistically

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🧠 Features

• 🖼 Encrypt/Decrypt Images with XOR logic using random or pseudo-random keys
• 📄 Encrypt/Decrypt Text Files (.txt, .csv, .log supported)
• 🎲 Random Key Generation using Python's secrets module
• 🤖 Pseudo-Random Key Generation using random with a user-defined seed
• 📊 Compare Key Entropy & Performance (via integrated Flask API)
• 💾 File download and preview support
• 💡 Simple, elegant GUI built using Streamlit

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⚙ How It Works

1. Select Operation: Choose from image/text encryption, decryption, or key comparison
2. Upload Files: Provide your source files and key/seed where required
3. Choose Key Type: Select random or pseudo-random key for the operation
4. Download Results: Get encrypted/decrypted files and the generated keys
5. Compare Security: Evaluate entropy and encryption speed for both key types

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🖥 Interface Preview

The interface offers:

• ✅ Sidebar navigation for operation selection
• ✅ File uploader widgets for source and key files
• ✅ Download buttons for encrypted/decrypted outputs
• ✅ Entropy and encryption time display in comparison view

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🛠 Setup & Running the Project

🔃 Backend (Flask API for entropy comparison)

Start the comparison server:

python compare_encryption.py

🌐 Frontend (Streamlit GUI)

In a new terminal, run the frontend:

streamlit run SecureCrypt.py

This will launch the user interface in your default browser at http://localhost:8501.

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📂 Project Structure

SecureCrypt/
├── compare_encryption.py
├── imageEncDec.py
├── imageEncDec.py
├── SecureCrypt.py
└── README.md

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🔐 Notes

• Keep your keys secure; random keys offer stronger security but are harder to reproduce
• Pseudo-random keys enable repeatable encryption with the same seed
• Use the comparison feature to understand key entropy and encryption speed tradeoffs

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🤝 Contributing

Contributions are welcome! Feel free to fork the repository and submit pull requests. For major changes, please open an issue first to discuss what you would like to change.

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📬 Contact

For questions or collaborations, reach out via GitHub.