What does the principle of integrity in information security refer to?

The principle of integrity in information security primarily refers to the accuracy and reliability of data. This principle ensures that information remains consistent, accurate, and trustworthy throughout its lifecycle. Protecting data integrity means implementing measures that prevent unauthorized alteration of data or corruption, thereby allowing organizations to rely on the information they use for decision-making and operations.

Specifically, data integrity can involve various techniques and practices, such as checksums, hashing, and error-checking mechanisms, designed to detect and prevent inconsistencies and unauthorized modifications. In the context of information systems, maintaining integrity is crucial because it directly impacts the organization's ability to function effectively and make decisions based on reliable data.

The other options relate to different aspects of information security. Restricting unauthorized access pertains more to confidentiality; recovering from incidents falls under availability; and providing data quickly relates to performance and responsiveness. Thus, the focus on accuracy and reliability makes the first choice the correct interpretation of the principle of integrity in information security.