🔐 Secure Data Encryption System

A Streamlit-based app to securely encrypt, store, and retrieve data using user-defined passkeys. It uses Fernet encryption, SHA-256 hashing, and JSON-based storage.

🚀 Features

• Encrypt and save sensitive data locally
• Decrypt data using the correct passkey
• Secure passkey hashing (SHA-256)
• Master password protection
• Tracks failed attempts and locks after 3 failures
• Clean and user-friendly Streamlit UI

🛠 Technologies Used

• Python
• Streamlit
• cryptography (Fernet)
• hashlib
• JSON
• os module

📁 Files

• secret key — stores the generated Fernet key
• data.json — encrypted data + hashed passkeys
• master_password — stores master password (read and hashed at runtime)

▶️ How to Run

1. Clone this repo
2. Install dependencies:

   pip install streamlit cryptography

Create a master_password file with your password.

Run the app:

bash Copy Edit streamlit run your_script.py ✅ Usage Store Data: Enter your data + a passkey → data gets encrypted and saved.

Retrieve Data: Provide encrypted text + correct passkey → view decrypted data.

After 3 wrong attempts, login with the master password to continue.

⚠️ Note This is a local demo app. Do not use it for real-world sensitive data