Integrity

• A. Only authorized users can access assets
• B. Availability
• C. Data redundancy
• D. Protecting data from unauthorized alteration

Answer: (D)

Integrity is about keeping data accurate and trustworthy by preventing unauthorized changes. When data is protected against tampering, alteration, or corruption, its accuracy and reliability are preserved, and you can trust what the system reports or stores.

The statement that best matches this concept is Protecting data from unauthorized alteration. It directly captures the essence of integrity: safeguarding data from any changes that aren’t approved or properly recorded, and ensuring that any modifications are legitimate and detectable. Techniques like checksums, cryptographic hashes, digital signatures, and change-control audit trails are typical means to maintain integrity, because they help detect and prevent tampering.

In contrast, the other options relate to different security properties. Only authorized users can access assets points to confidentiality and access control, not specifically integrity. Availability concerns whether data and systems are accessible when needed. Data redundancy focuses on reliability and fault tolerance, which supports availability rather than ensuring data remains unaltered.