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Two-Factor Authentication Setup

USDN requires two-factor authentication (2FA) for all accounts to ensure the highest level of security. This guide will walk you through the process of setting up 2FA for your account.

Portal walkthrough (screenshots)​

For step-by-step screenshots in the web portal—opening Account Settings, using Manage 2FA, scanning the QR code for an authenticator app, and using the Passkeys tab—see Account settings in the portal.

Understanding 2FA​

Two-factor authentication adds an extra layer of security to your account by requiring:

  1. Something you know (your password)
  2. Something you have (authenticator app or YubiKey)

Setup Options​

USDN supports two methods for 2FA:

1. Authenticator App​

  • Google Authenticator
  • Authy
  • Microsoft Authenticator
  • Other TOTP-compatible apps

2. YubiKey​

  • Hardware security key
  • Physical authentication device
  • Enhanced security option

Setting Up Authenticator App​

Prerequisites​

  1. Download and install a compatible authenticator app
  2. Have your mobile device ready
  3. Log into your USDN account

Setup Process (authenticator app)​

  1. In the portal, open Account → Security → Manage 2FA (see the portal walkthrough).
  2. Select Authenticator App and follow the prompts to scan the QR code and enter a verification code.
  3. Save backup codes when they are shown.

Using 2FA​

Daily Login Process​

  1. Enter your username and password
  2. When prompted, open your authenticator app
  3. Enter the current 6-digit code
  4. Complete login

Using Backup Codes​

  1. Click "Use Backup Code" at login
  2. Enter one of your backup codes
  3. Generate new backup codes after using one

Troubleshooting​

Common Issues​

  1. Time Sync Problems:

    • Check device time settings
    • Sync time automatically
    • Contact support if persisting

  2. Lost Access:

    • Use backup codes
    • Contact administrator
    • Verify identity through support

Lost Device​

If you lose your device:

  1. Use backup codes to login
  2. Reset 2FA immediately
  3. Configure new device
  4. Generate new backup codes

Security Best Practices​

General Guidelines​

  1. Never share 2FA codes
  2. Store backup codes securely
  3. Use unique passwords
  4. Keep authenticator app updated

Device Security​

  1. Enable device encryption
  2. Use device passcode/biometrics
  3. Keep software updated
  4. Enable remote wipe capability

Alternative: YubiKey Setup​

For enhanced security, consider using a YubiKey:

  • YubiKey Setup Guide
  • Hardware-based security
  • Phishing-resistant authentication
  • Multiple protocol support

Need Help?​

If you encounter issues:

  1. Check our Security Overview
  2. Review Best Practices
  3. Visit our Support and Escalation Levels for comprehensive support options
  4. Contact support through the Support Portal
  5. For critical security issues, Enterprise and Premium customers have access to 24/7 emergency support