What functionality does encryption provide beyond security?

• A. Increased accessibility of data
• B. Protection of data integrity
• C. Reduction of data storage size
• D. Faster data processing speeds

Answer: (B)

Encryption serves more than just the purpose of securing data; it also plays a critical role in protecting the integrity of that data. When data is encrypted, it becomes unintelligible without the proper key, which not only protects it from unauthorized access but also ensures that any unauthorized changes to the encrypted data can be detected.

This means that if an attacker attempts to alter the encrypted data, the changes would likely render it unreadable or produce a different ciphertext when decrypted, thus alerting the legitimate owner to potential tampering. This assurance that the data remains unaltered during storage or transmission is a core aspect of data integrity. It allows organizations and users to trust that the information they are accessing or using has not been compromised.

Other choices do not correctly align with the primary benefits of encryption. While increased accessibility or faster processing speeds may be beneficial in other contexts, encryption primarily emphasizes security and integrity rather than improving performance or accessibility metrics. Similarly, reduction of data storage size is not a function of encryption itself, as encrypted data often expands in size due to the additional structure such as padding needed for secure encryption.