Secure Chat - AES-256 Encryption

A professional Flutter web application for encrypting and decrypting messages using AES-256-CBC encryption.

Features

• 🔐 AES-256-CBC Encryption - Industry-standard encryption algorithm
• 🌐 Cross-Platform - Works on web, iOS, Android, and desktop
• 🎨 Modern UI - Clean and professional Material Design 3 interface
• 📋 Copy to Clipboard - Easy sharing of encrypted/decrypted messages
• ✅ Error Handling - Comprehensive error messages and validation

Getting Started

Prerequisites

• Flutter SDK (3.9.0 or higher)
• Dart SDK

Installation

1. Clone the repository:

git clone https://github.com/vinay-nex/secure_chat.git
cd secure_chat

2. Install dependencies:

flutter pub get

3. Run the app:

flutter run -d chrome

Building for Web

flutter build web --release

The built files will be in the build/web directory.

How to Use

1. Enter your message in the text field
2. Click Encrypt to encrypt your message
3. Click Decrypt to decrypt an encrypted message
4. Use the Copy button to copy the result to clipboard
5. Use Clear All to reset all fields

Project Structure

lib/
├── main.dart                 # App entry point
├── screens/
│   └── encryption_screen.dart  # Main encryption UI
└── services/
    └── encryption_service.dart # AES-256 encryption logic

Technologies Used

• Flutter - UI framework
• encrypt - AES-256 encryption package
• Google Fonts - Noto Sans font family

Security Note

⚠️ Important: This is a demo application. The encryption key is hardcoded for demonstration purposes. For production use, implement proper key management and storage.

License

This project is open source and available under the MIT License.

Contributing

Contributions, issues, and feature requests are welcome!

Author

Created with ❤️ using Flutter