Security Best Practices for Flutter Applications

Security is paramount in mobile apps. Implement these practices to protect your Flutter app.

Secure Storage

Never store sensitive data in plain text:

final storage = FlutterSecureStorage();
await storage.write(key: 'token', value: authToken);

API Security

Use HTTPS and validate certificates:

final client = HttpClient()
  ..badCertificateCallback = 
    (cert, host, port) => false; // Reject invalid certs

Code Obfuscation

Protect your source code:

flutter build apk --obfuscate --split-debug-info=build/debug

Input Validation

Always validate and sanitize user input to prevent injection attacks.

Security is not optional - build it in from day one.