The use of two or more authentication methods to the login process, which brings an additional layer of security.

Other than a username and password, with multi-factor authentication logging in to a service will also require a piece of information that is provided exclusively to the user, such as a single-use code that’s sent directly to an email address or telephone.

Two-Factor Authentication (2FA) is the most commonly type of Multi-Factor Authentication seen in the industry.

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Multi-Factor Authentication
Definition of "Multi-Factor Authentication" by Chat GPT: Multi-factor authentication (MFA) is a security measure that requires users to provide multiple forms of identification to access a system or service. This can include a combination of something the user knows (like a password or PIN), something the user has (like a hardware token or smartphone), or something the user is (like a fingerprint or facial recognition scan). MFA makes it more difficult for unauthorized users to gain access to sensitive information, even if they have obtained one factor of authentication.
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