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What Does an Authenticator App Do? Authenticator apps are used as an additional method of verification for Multi-Factor Authentication (MFA). MFA is an important security measure that protects your account in case your password is compromised.

An authenticator app is a mobile application that provides an extra layer of security to your online accounts by generating time-based one-time passwords (TOTPs). These passwords are used for two-factor authentication (2FA) and help protect your accounts from unauthorized access.