What is another term commonly used for two-factor authentication?

The term "two-factor authentication" (2FA) specifically refers to a security process that requires two different forms of identification from the user before granting access to an account or system. This usually involves something the user knows (like a password) and something they have (such as a smartphone app to generate a code). The correct term that encapsulates the essence of 2FA is "strong authentication."

Strong authentication emphasizes the importance of using multiple authentication methods to significantly enhance security, making it much more difficult for unauthorized users to gain access. The use of more than one factor helps protect against various attack vectors, such as phishing or credential theft.

While other options may involve aspects of authentication, they do not specifically highlight the dual-factor nature of two-factor authentication as effectively as "strong authentication" does. For example, multi-factor authentication is a broader term that encompasses two-factor authentication, but it can involve more than two factors if needed. Token-based authentication refers specifically to using a token, which could be part of 2FA but does not exclusively define it. Therefore, "strong authentication" effectively represents the principle behind two-factor authentication by highlighting its robustness in enhancing security through multiple identification factors.