What is the term for an authentication method that requires two different factors to verify a user's identity?

What is the term for an authentication method that requires two different factors to verify a user's identity?

• A. Single Factor Authentication
• B. Two-Factor Authentication
• C. Multi-factor Authentication
• D. Single Sign-On

Answer: (B)

The term for an authentication method that requires two different factors to verify a user's identity is Two-Factor Authentication. This method enhances security by combining two distinct forms of verification, typically something you know (like a password) and something you have (like a mobile device or a token). By requiring these two different factors, Two-Factor Authentication reduces the likelihood of unauthorized access because even if one factor (such as the password) is compromised, the second factor still provides a layer of security. This dual requirement makes it harder for attackers to gain access to accounts and sensitive information. While Multi-Factor Authentication is a broader term that encompasses any use of two or more verification factors (which could include more than just two factors), Two-Factor Authentication specifically refers to the use of exactly two factors. Single Factor Authentication employs just one method of verification, and Single Sign-On allows users to access multiple applications with one set of credentials, which does not inherently involve multiple factors for authentication.

The term for an authentication method that requires two different factors to verify a user's identity is Two-Factor Authentication. This method enhances security by combining two distinct forms of verification, typically something you know (like a password) and something you have (like a mobile device or a token).

By requiring these two different factors, Two-Factor Authentication reduces the likelihood of unauthorized access because even if one factor (such as the password) is compromised, the second factor still provides a layer of security. This dual requirement makes it harder for attackers to gain access to accounts and sensitive information.

While Multi-Factor Authentication is a broader term that encompasses any use of two or more verification factors (which could include more than just two factors), Two-Factor Authentication specifically refers to the use of exactly two factors. Single Factor Authentication employs just one method of verification, and Single Sign-On allows users to access multiple applications with one set of credentials, which does not inherently involve multiple factors for authentication.