Encrypted_chat - Secure Communication App

End-to-end encrypted messaging with RSA-2048 and AES-CBC

Core Tech Stack

• Encryption: RSA-2048 (key exchange) + AES-CBC (message encryption)
• Storage: Hive (encrypted local) + Firebase (cloud sync)
• Auth: QR-based key exchange + Anonymous IDs
• Platform: Flutter (Android/iOS)

Key Features

• 🔐 End-to-end encryption with perfect forward secrecy
• 🔑 Secure key exchange via QR codes
• 💾 Encrypted local storage with cloud backup
• 👤 Anonymous user system with random nicknames
• 📱 Cross-platform with Material Design 3

Quick Start

# Clone & Setup
git clone https://github.com/Sd-Shiivam/Encrypted_chat.git
cd Encrypted_chat
flutter pub get

# Run
flutter run

Dependencies

dependencies:
  pointycastle: ^3.9.1 # RSA/AES crypto
  encrypt: ^5.0.1 # AES implementation
  hive: ^2.2.3 # Encrypted storage
  firebase_core: ^2.4.0 # Backend
  cloud_firestore: ^4.3.0 # Database
  qr_flutter: ^4.0.0 # QR generation
  mobile_scanner: ^6.0.10 # QR scanning

Security Implementation

• RSA-2048 for secure key exchange
• AES-CBC with unique session keys
• Fortuna secure random generation
• Encrypted local storage (Hive)
• Private keys never leave device
• Secure cloud sync (Firebase)

Development

# Setup
flutter pub get

# Code run
flutter run
# Test
flutter test

License

MIT License - See LICENSE

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Built with ❤️ by Cyb3rK-ng Team