Lesson 5
Authenticator Apps
See how an app makes the same code as the website without either asking the other, why a wrong clock breaks it, and why a typed code can still be stolen.
Builds on
Predict
You land in Lisbon with mobile data switched off to avoid roaming charges, so your phone has no connection at all. At the hotel, you sign in to your email on your laptop, over the hotel Wi-Fi, and it asks for the code from the authenticator app on your phone.
What will the app show?
Choose a prediction, then select Next to see the answer.