What is an important security measure for financial transactions?

• A. Single sign-on authentication
• B. Two-factor authentication
• C. Customer feedback forms
• D. Simple password protection

Answer: (B)

Two-factor authentication is a crucial security measure for financial transactions because it adds an additional layer of protection beyond just a password. By requiring a second form of verification, typically a code sent to a mobile device or an email, it helps to ensure that even if someone were to gain access to a user's password, they would still need that second piece of information to complete a transaction. This significantly reduces the risk of unauthorized access to sensitive financial data.

In contrast, while single sign-on authentication can provide convenience by allowing users to access multiple services with one set of credentials, it doesn't inherently offer the enhanced security that two-factor authentication does. Customer feedback forms are important for understanding user experiences and improving services, but they do not play a role in securing transactions. Simple password protection, while necessary, is not sufficient on its own to adequately secure financial transactions, as passwords can be weak, reused, or easily compromised.