N10-009 Question #203: Real Exam Question with Answer & Explanation

Question

Which of the following does a hash provide?

Options

• ANon-repudiation
• BIntegrity
• CConfidentiality
• DAvailability

Explanation

A hash provides data integrity by generating a fixed-size string of characters from data, ensuring that any alteration to the original data will result in a different hash value. This allows verification that the data has not been tampered with.

Common mistakes.

• A. Non-repudiation ensures that a party cannot deny sending a message or taking an action, typically achieved through digital signatures, which combine hashing with encryption.
• C. Confidentiality ensures that data is only accessible to authorized individuals, which is achieved through encryption, not hashing alone.
• D. Availability ensures that systems and data are accessible to authorized users when needed, which is addressed by redundancy, backups, and fault tolerance, not hashing.

Concept tested. Cryptographic hashing for data integrity

Reference. https://learn.microsoft.com/en-us/windows/security/information-protection/windows-information-protection/how-it-works#protection-of-data-at-rest

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