Which of the following best describes the term integrity in information security?

• A. The protection of system performance
• B. The accuracy and consistency of data and system functionality
• C. The number of system users
• D. The speed of data processing

Answer: (B)

The term integrity in information security primarily refers to the accuracy and consistency of data and system functionality. This principle is critical because it ensures that data is reliable and has not been altered or tampered with in unauthorized ways. Integrity protects data from being modified in a way that can lead to misinformation and inaccuracies, which is essential for making informed decisions based on that data. Maintaining integrity involves various measures such as access controls, hashing, and auditing to ensure that information remains authentic throughout its lifecycle.

In contrast, the other options address different aspects of information security or system performance. The protection of system performance focuses on the operational uptime and resources of a system, which is important but separate from the concept of data integrity. The number of system users is a metric concerning access and potential threats but does not directly relate to the concept of data accuracy or consistency. Finally, the speed of data processing pertains to efficiency and performance rather than the integrity of the data itself. Overall, integrity is specifically about ensuring that data remains intact and unchanged, making the second option the most accurate description of the term.