When dealing with sensitive data, what measure is implemented to improve security?

Using multifactor authentication (MFA) to secure sensitive data is an effective measure as it significantly enhances security by requiring multiple forms of verification before granting access to information or systems. MFA typically combines something the user knows (like a password), something the user has (such as a smartphone or security token), and sometimes something the user is (biometric verification, like a fingerprint). This layered approach makes it substantially more difficult for unauthorized users to gain access, as they would need to compromise multiple authentication factors to succeed.

In contrast, implementing data encryption alone, while crucial for protecting data at rest and in transit, does not address identity verification and access control. Regularly changing passwords can help, but if a user's password is weak or compromised, this measure alone does not provide strong security. Lastly, using a single-factor authentication method is the least secure option, as it relies solely on one form of verification, making it easier for attackers to gain unauthorized access.