🔐 Encrypted Chat App (Flutter + Firebase)

A secure, real-time messaging app built using Flutter, Firebase, and AES-256 encryption. Designed for privacy-focused communication with full authentication, encrypted storage, and modular architecture.

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🚀 Features

• 🔐 End-to-End Encryption using AES-256
• 📲 Real-time Messaging via Cloud Firestore
• 👥 User Authentication (Email/Password)
• ✅ Modern Chat UI with message bubbles
• 📦 Modular, scalable architecture
• 🧠 Decryption on-tap for messages
• 🔓 Logout & session management

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📸 Screenshots

Add your own screenshots here after running the app.

📱 Login Screen           💬 Chat Screen (Encrypted)      🔓 Message Decryption

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📁 Project Structure

lib/
├── main.dart
├── screens/
│   ├── login_screen.dart
│   └── chat_screen.dart
├── services/
│   ├── auth_service.dart
│   ├── encryption_service.dart
├── widgets/
│   └── chat_bubble.dart

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🛠️ Technologies Used

• Flutter SDK >=2.19.0
• Firebase Auth
• Cloud Firestore
• AES Encryption (encrypt package)
• Secure Storage (flutter_secure_storage)
• Modular architecture

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📦 Setup Instructions

1. Clone this repository:

   git clone https://github.com/your-username/encrypted_chat_app.git
   cd encrypted_chat_app

2. Install dependencies:

   flutter pub get

3. Firebase Setup:

   • Create a Firebase project at Firebase Console
   • Enable Email/Password Authentication
   • Enable Cloud Firestore
   • Download and add google-services.json to android/app/

4. Run the app:

   flutter run

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📄 License

MIT License © 2025 Ali
Free to use for academic and learning purposes.

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🤝 Contributing

Pull requests are welcome! For major changes, please open an issue first to discuss what you'd like to change.