Secure Storage

When you handle sensitive information in your Flutter app such as authentication tokens, user credentials, or API keys standard local storage options like SharedPreferences are not secure enough. Secure storage provides a way to store this data safely, using encryption and platform-specific protections. This is essential to protect your users from data leaks or attacks.

Secure storage solutions like flutter_secure_storage use encryption to protect your data. On Android, it stores data in the encrypted SharedPreferences using the Android Keystore. On iOS, it uses the Keychain, which is encrypted and managed by the system. This means your sensitive data—such as the token in the previous example—is much safer than if it were stored in plain text. However, always remember that no solution is entirely foolproof, and you should avoid storing highly sensitive secrets on the client if possible.