What property ensures the accuracy and completeness of data?

The property that ensures the accuracy and completeness of data is integrity. In the context of information security, integrity refers to the assurance that data is accurate, consistent, and trustworthy over its entire lifecycle. This means that data cannot be tampered with or altered in an unauthorized manner, thus maintaining its validity and reliability.

Preserving data integrity involves using various mechanisms like checksums, hashing algorithms, and access controls to prevent unauthorized changes. It is critical for ensuring that data remains intact as intended by its original creator, hence promoting trust in the information being processed and utilized.

Other properties, while important, serve different purposes. Confidentiality focuses on protecting data from unauthorized access, availability ensures that information is accessible to authorized users when needed, and non-repudiation prevents individuals from denying their actions regarding data. Each of these plays a pivotal role in security, but they do not specifically address the accuracy and completeness that integrity does.