Google Security Key Enforcement Features

Supports hardware tokens, which are often USB-sized, fob-like devices that store codes.

Offers software tokens, which are applications installed on a mobile phone, wearable devices, or desktops and generate time-based one-time passcodes (TOTP) that a user can easily copy. Software tokens work both online and offline.

Allows biometric factors such as fingerprints, faceprints, voiceprints, or other biometric information to be used as an authentication factor.

Offers mobile push authentication, which is a user-friendly method that does not require a user to copy a code, but rather accept or deny an authentication using a mobile application. Mobile push authentication only works when a user is connected to the internet.

Offers an easy to understand user interface to make setup smooth.

Offers a mobile software development kit (SDK) for iOS, Blackberry, and Android.

Offers a software development kit (SDK) for web-based applications.