If the registered mobile device becomes unavailable, an administrator must disable MFA for the user so that MFA can be re-enabled with a new device. This same device must be used to generate the time-based one-time passcode every time the user signs in. The procedure to enable MFA for a user includes the registration of the mobile device. REGISTERED MOBILE DEVICE Multi-factor authentication is enabled for a specific user and for a specific device. You'll use the app to register your device and then you'll use the same app (on the same device) to generate a time-based one-time passcode every time you sign in. To enable MFA for the IAM service, you'll need a device with an authenticator app installed. Examples of authenticator apps are Oracle Mobile Authenticator and Google Authenticator.

AUTHENTICATOR APP An app you install on your mobile device that can provide software-based secure tokens for identity verification. Examples of authentication factors are a password (something you know) and a device (something you have).

MULTI-FACTOR AUTHENTICATION (MFA) Multi-factor authentication (MFA) is a method of authentication that requires the use of more than one factor to verify a user’s identity. Here's a list of the basic concepts you need to be familiar with.

On prem mfa