What protective measure is NOT mentioned for safeguarding sensitive end-user data?

Two-factor authentication is a security measure designed to enhance access control and user verification, rather than specifically focusing on the protection of sensitive end-user data during processing or storage. It adds a layer of security by requiring users to provide two forms of identification before accessing an account, typically something they know (like a password) and something they have (such as a mobile device or a physical token).

In contrast, the other options focus on data protection techniques that directly address the management and safeguarding of sensitive information. URL exclusion helps prevent data leakage from specific URLs, IP address masking conceals the actual IP addresses to protect user anonymity, and user input masking hides sensitive information while being entered. These measures are more closely related to the privacy of end-user data itself, making them more relevant in contexts where sensitive data protection is the primary goal.