🔐 Secure Data Encryption System

A Streamlit-based web application for securely storing and retrieving sensitive data using modern encryption and hashed authentication 🔒.
Designed for users who value confidentiality, data integrity, and simplicity in managing secure information.

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🌐 Live Demo

🚀 Access the deployed app here:
👉 Open Secure Data Encryption System

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✨ Features & Highlights

• 👤 User Registration & Login — Create accounts and log in with securely hashed passwords.
• 🔒 Data Encryption — Encrypt sensitive text using a user-defined passkey.
• 🔓 Data Retrieval — Decrypt and view your data safely using the correct passkey.
• 💾 Persistent Storage — All encrypted data is stored securely in a local JSON file.
• 🛡 Security Layers:
  • Passwords & passkeys hashed via PBKDF2-HMAC-SHA256 with salt 🧂
  • Data encrypted using Fernet symmetric encryption 🔐
  • Login attempt limits + temporary lockouts ⏳ to prevent brute-force attacks

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📁 Project Structure

Project_05_secure_data_encryption/
│
├── main.py              # 🎯 Main Streamlit application
├── requirements.txt     # 📦 Python dependencies
├── secure_data.json     # 🔐 Encrypted user data (auto-generated)
└── .gitattributes       # ⚙️ Git configuration

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⚙️ Installation

1. Clone this repository

   git clone https://github.com/HasnainDevMaster/Project_05_secure_data_encryption
   cd Project_05_secure_data_encryption

2. Install dependencies

   pip install -r requirements.txt

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🚀 Usage Guide

🧾 Register a New User

• Open the app and go to “Register” in the sidebar
• Enter a username and password
• Your credentials are hashed and saved securely

🔑 Login

• Head to the “Login” page
• Enter your username and password to access the dashboard

💬 Store Encrypted Data

• After login, open “Store Data”
• Type in your message and a passkey
• Click “Encrypt and Store” — your entry is saved encrypted 🔐

📂 Retrieve Encrypted Data

• Go to “Retrieve Data”
• Select an entry and enter the correct passkey
• View your decrypted message instantly ✨

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🧠 Security Notes

• ⚠️ Passwords & passkeys are never stored in plain text
• 🔑 Each user’s data is encrypted using their unique passkey
• ⏳ 3 failed attempts → temporary lockout for 60 seconds
• ❌ Lost passkey? Data cannot be recovered (by design)
• 🧩 Uses industry-standard cryptography.Fernet for robust security

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🧩 Dependencies

📦 Listed in requirements.txt:

• 🖥️ Streamlit → For the interactive web interface
• 🔏 Cryptography → For encryption, hashing, and key management

Install all:

pip install -r requirements.txt

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🗂️ File Descriptions

File	Description
main.py	Main application containing encryption logic, authentication, and Streamlit UI.
secure_data.json	Stores encrypted user data and hashed credentials.
requirements.txt	Python dependencies required for setup.
.gitattributes	Git settings and config.

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🏆 Summary

This Secure Data Encryption System combines Streamlit’s simplicity with powerful cryptography to create a secure, interactive data vault 🔐. It’s a perfect educational or real-world demonstration of how authentication, encryption, and session control can work seamlessly in Python 🚀.

💡 Ideal for learning, personal data protection, and showcasing secure app design.

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👨‍💻 Developed by Syed Hasnain Ali Shah 🌟 Making security simple, strong, and accessible for everyone.