Authenticator App

Secure, cross-platform, and user-friendly TOTP (Time-based One-Time Password) authenticator application built with React Native. It provides a simple and effective way to manage two-factor authentication (2FA) codes for all your online accounts, compiling for both Android and iOS from a single codebase.

Features

• Cross-platform: Android and iOS support from a single codebase
• Secure Storage: All secret keys are stored securely on the device
• Offline functionality: Generates TOTP codes even when your device is offline
• QR Code Scanner: Easy setup by scanning QR codes from service providers
• Auto-refresh: TOTP codes automatically refresh every 30 seconds

Installation

Prerequisites

• Node.js (v16 or higher)
• React Native CLI
• Android Studio (for Android development)
• Xcode (for iOS development, macOS only)

Running the App

Android

npx react-native run-android

iOS

npx react-native run-ios

Security

This app implements several security measures:

• Encrypted Storage: All sensitive data is encrypted before storage
• No Network Transmission: TOTP generation happens entirely offline
• Secure Key Storage: Uses iOS Keychain and Android Keystore
• App Lock: Optional biometric or PIN protection (if implemented)

Development

Running Tests

npm test
# or
yarn test

Building for Production

Android

cd android
./gradlew assembleRelease

iOS

1. Open the project in Xcode
2. Select "Product" > "Archive"
3. Follow the App Store submission process

Contributing

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.