One challenge in building login approvals was balancing security and usability. Similar features on other websites require you to download authentication apps or purchase physical tokens to act as your second factor. These are good approaches, and we’re considering incorporating them in the future, but they require a lot from the user before being able to turn on the feature. To have the biggest impact and provide this added security to the most people, we decided on SMS as the best choice for a second factor. That’s a big part of the culture here at Facebook, whether you’re an intern or an old hand: focus on impact.
Die Einrichtung funktioniert über die Konteneinstellungen und dort im Punkt Kontosicherheit:
Bei mir war die Funktion noch nicht freigeschaltet, aber das sollte bald aktiviert werden.