Which form of authentication is typically considered more secure?

Two-factor authentication is widely recognized as more secure compared to other forms of authentication because it combines two separate factors to verify a user's identity. Typically, these factors include something the user knows (like a password) and something the user has (like a smartphone or hardware token). This layered approach significantly enhances security.

In the case of a single password or a username and password combination, if an attacker manages to steal or guess the password, they gain full access without any additional barriers. Security questions can often be guessed or found through social engineering or information readily available online, which further undermines their effectiveness. In contrast, two-factor authentication requires the attacker to have both the password and access to the second factor, making unauthorized access much more difficult.

Overall, two-factor authentication provides a robust mechanism that leverages multiple types of verification, resulting in a higher level of security against unauthorized access.