Secure storage for credentials in Flutter - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is secure storage in mobile apps?

Secure storage is a safe place on a device where sensitive data like passwords or tokens are saved so others can't easily access them.

beginner

Which Flutter package is commonly used for secure storage?

The flutter_secure_storage package is commonly used to store sensitive data securely on both Android and iOS devices.

intermediate

How does flutter_secure_storage protect data on Android?

It uses the Android Keystore system to encrypt data, making it accessible only to your app and protected by the device's security.

beginner

Why should you avoid storing passwords in plain text in mobile apps?

Storing passwords in plain text risks exposing them if the device is lost or hacked. Secure storage encrypts data to keep it safe.

beginner

What is a simple Flutter code snippet to save a token securely?

Using flutter_secure_storage: final storage = FlutterSecureStorage(); await storage.write(key: 'token', value: 'abc123');

Which Flutter package helps store credentials securely?

A flutter_secure_storage

B shared_preferences

C http

D path_provider

flutter_secure_storage encrypts data and stores it securely, unlike shared_preferences which is not encrypted.

What does flutter_secure_storage use on iOS to protect data?

A Keychain

B SQLite

C UserDefaults

D File system

On iOS, flutter_secure_storage uses the Keychain service to securely store data.

Why is it important to encrypt credentials on a device?

A To improve app speed

B To save storage space

C To prevent unauthorized access

D To reduce battery usage

Encryption protects sensitive data from unauthorized access if the device is lost or compromised.

Which of these is NOT a secure way to store passwords in Flutter?

A Using flutter_secure_storage

B Saving in plain text in shared_preferences

C Using Keychain on iOS

D Using Android Keystore

shared_preferences stores data unencrypted and is not safe for passwords.

What is the first step to use flutter_secure_storage in your Flutter app?

A Create a database

B Import dart:io

C Use setState()

D Add flutter_secure_storage to pubspec.yaml

You must add the flutter_secure_storage package to your pubspec.yaml file before using it.

Explain how flutter_secure_storage helps keep user credentials safe on mobile devices.

Think about how data is protected differently on Android and iOS.

Describe the steps to securely save and retrieve a password using flutter_secure_storage in a Flutter app.

Focus on the main methods used to store and get data.