> ## Documentation Index
> Fetch the complete documentation index at: https://levelblue-final.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Using Multi-Factor Authentication

 Role Availability | ❌ Read-Only ❌ Analyst ✔️ Manager

To protect your USM Central account, enable multi-factor authentication (MFA) (A method of access control in which a user is granted access only after successfully presenting several separate pieces of evidence to an authentication mechanism – typically at least two of the following categories: knowledge, possession, and inherence.). MFA adds extra security because it requires multiple factors to authenticate a user, making it more difficult for an unauthorized person to gain access to the account. In USM Central, MFA provides a layered defense of two independent credentials: what you know (your user account name and password) and what you have (security token on your personal device).

To use MFA in USM Central, you must have a mobile device that supports an Authenticator app. LevelBlue recommends the [Google Authenticator app](https://support.google.com/accounts/answer/1066447), which is available for iOS and Android devices. Google Authenticator implements two-step verification services using the Time-based One-Time Password (TOTP) algorithm and HMAC-based One-time Password Algorithm (HOTP) for authentication.

> [accordion] Configure MFA for Your Account
>
> Before you set up MFA for your account, you must install the Authenticator app on your device.
>
> **To configure MFA for your account**
>
> 1. At the bottom of the expanded pane of the USM Central web user interface (UI), hover over the ![](https://mintcdn.com/levelblue-final/OSGozCaHsL0BDQ3k/images/usm-central/user-gray.svg?fit=max\&auto=format\&n=OSGozCaHsL0BDQ3k\&q=85\&s=cd8ba5a970bca708c8141197a5c3306f) icon and select **Profile**.
>
> 2. Click **Enable Multi-Factor Authentication**.
>
>    The pane expands to provide a unique QR code that is used by the Authenticator app to retrieve a verification code. The code is emailed to you as well.
>
>    ![](https://mintcdn.com/levelblue-final/bPDl8XLOsO3r1x9k/images/usm-central/mfa-user_thumb_0_60.webp?fit=max\&auto=format\&n=bPDl8XLOsO3r1x9k\&q=85\&s=bf000082ba9675af8c8ffcd1954b0fe5)
>
> 3. Open the Authenticator app on your device.
>
> 4. Scan the QR code using the Authenticator app.
>
> 5. Click **Save**.
>
> 6. Hover over the ![](https://mintcdn.com/levelblue-final/OSGozCaHsL0BDQ3k/images/usm-central/user-gray.svg?fit=max\&auto=format\&n=OSGozCaHsL0BDQ3k\&q=85\&s=cd8ba5a970bca708c8141197a5c3306f) icon and select **Logout**.
>
> 7. Click **Login**.
>
> 8. On the login page, enter your user account and password, and click **Login**.
>
> 9. Enter the one-time passcode in the text box of USM Central, and then click **Login**.

> [accordion] Change Your Authentication Device
>
> If you lose or change your mobile device or need to have your MFA reset, please contact [LevelBlue Technical Support](https://cybersecurity.att.com/support).