Which of the following is not a supported source for identifying users during a login challenge to Google Workspace?

The identification of users during a login challenge to Google Workspace requires methods that can reliably validate a user’s identity. In this context, mobile authentication apps, backup codes, and device recognition are all methods that facilitate user verification by generating unique codes or recognizing trusted devices.

Mobile authentication apps provide time-based one-time passwords (TOTPs) that can be used during login challenges. Similarly, backup codes are pre-generated codes that users can store and use if they are unable to access their primary method of authentication. Device recognition works by identifying and verifying devices that have been previously used for logging into the system.

On the other hand, Google Authenticator code is a specific implementation of a mobile authentication app that generates codes to be used during the login process. While it functions similarly to mobile authentication apps in general, it is considered a supported and widely used method for two-factor authentication. Thus, it should be included in discussions of supported sources for user identification during login challenges.

Device recognition is also a backed method that helps to simplify the login process by identifying devices the user has previously logged in from, allowing them to bypass some security checks under trusted circumstances.

Therefore, the answer that signifies a method that is not a supported source for identifying users during a login challenge has been