What does multifactor authentication enhance in a security system?

Multifactor authentication enhances security by requiring multiple forms of verification before granting access to sensitive information or systems. This approach combines different types of authentication factors, such as something you know (like a password), something you have (like a smart card or mobile device), and something you are (such as biometric data). By implementing these multiple layers of security, it significantly reduces the likelihood of unauthorized access, as an attacker would need to compromise more than one factor to gain entry.

The other choices do not correctly represent the primary purpose of multifactor authentication. While user convenience and speed of access may sometimes be affected by the added steps of verification, they are not the main focus of this security measure. Software compatibility is also not a relevant consideration when discussing the benefits of multifactor authentication, as it pertains more to how securely users can access software rather than the mechanisms through which they authenticate their identity.