flutter-secure-storage-pattern

To store API tokens securely on-device in Flutter, use FlutterSecureStorage with platform-specific Android and iOS options to encrypt data at rest. This pattern prevents exposure and tampering while managing login, refresh, and logout workflows.

Yes, you can protect secure storage in Flutter with biometric authentication by integrating local_auth. This pattern optionally requires biometric checks before reading sensitive values like tokens or PINs, adding an extra layer of on-device security.

You should avoid SharedPreferences for sensitive data in Flutter because it does not encrypt data at rest. Using FlutterSecureStorage instead enforces proper encryption and platform-specific protections against exposure, tampering, and unauthorized access.

To handle PlatformException when reading Flutter secure storage, implement error resilience checks for device lock or storage failures. This pattern gracefully catches exceptions during read and write operations to prevent app crashes.

Yes, Flutter secure storage works across login, refresh, and logout workflows. This pattern manages reading and writing encrypted tokens securely throughout the authentication lifecycle while maintaining platform-specific storage options.