Meeting which of the following security objectives BEST ensures that information is protected against unauthorized disclosure?

Confidentiality is the core security objective that ensures information is protected from unauthorized access, disclosure, or viewing, meaning only authorized entities can read or otherwise access sensitive data. This is fundamental to preventing information leakage and maintaining privacy.

Integrity ensures information is protected from unauthorized modification or destruction, not disclosure.

Authenticity ensures that the identity of a user, process, or system is confirmed, not directly preventing information disclosure.

Nonrepudiation ensures that a party cannot deny having performed an action, which relates to accountability, not preventing unauthorized disclosure.