What is the term for an extra layer of security requiring two pieces of information to access an account?

What is the term for an extra layer of security requiring two pieces of information to access an account?

• A. Single Sign-On
• B. Two-Step Verification
• C. 2-Factor Authentication (2FA)
• D. Multi-Factor Authentication

Answer: (C)

The term for an extra layer of security that requires two pieces of information to access an account is indeed 2-Factor Authentication (2FA). This security measure enhances the protection of accounts by requiring users to provide two distinct forms of identification before granting access. Typically, this involves something the user knows, like a password, and something the user has, such as a smartphone app that generates a time-sensitive code or a text message containing a verification code. 2FA is widely recognized for its effectiveness in reducing the likelihood of unauthorized access because even if one factor, such as the password, is compromised, the second factor adds a significant barrier against potential breaches. This practice has become increasingly common among online services as it strengthens account security in an era where cyber threats are prevalent. In contrast, single sign-on allows users to log in once and gain access to multiple accounts or services without needing to re-enter their credentials. Multi-factor authentication is a broader term that may include more than two factors for verification, while two-step verification is often used interchangeably with 2FA, but doesn't always restrict itself to precisely two factors. Therefore, 2FA is the most specific and accurate term for the concept described in the question.

The term for an extra layer of security that requires two pieces of information to access an account is indeed 2-Factor Authentication (2FA). This security measure enhances the protection of accounts by requiring users to provide two distinct forms of identification before granting access. Typically, this involves something the user knows, like a password, and something the user has, such as a smartphone app that generates a time-sensitive code or a text message containing a verification code.

2FA is widely recognized for its effectiveness in reducing the likelihood of unauthorized access because even if one factor, such as the password, is compromised, the second factor adds a significant barrier against potential breaches. This practice has become increasingly common among online services as it strengthens account security in an era where cyber threats are prevalent.

In contrast, single sign-on allows users to log in once and gain access to multiple accounts or services without needing to re-enter their credentials. Multi-factor authentication is a broader term that may include more than two factors for verification, while two-step verification is often used interchangeably with 2FA, but doesn't always restrict itself to precisely two factors. Therefore, 2FA is the most specific and accurate term for the concept described in the question.