In the CIA triad, which principle is concerned with preventing erroneous modification of data?

The principle that focuses on preventing erroneous modification of data is integrity. In the context of the CIA triad—Confidentiality, Integrity, and Availability—integrity ensures that data remains accurate and trustworthy. This means that mechanisms must be in place to prevent unauthorized changes, as well as to detect any accidental or malicious modifications to the data.

Integrity encompasses processes like checksums, data validation, version control, and access controls that help maintain the state of data as intended over its lifecycle. By ensuring that only authorized individuals can modify data and that any changes are conducted in a controlled manner, the integrity principle protects information from corruption or unauthorized alterations.

Confidentiality relates to protecting information from unauthorized access, while availability ensures that authorized users have access to information when needed. Reliability, although an important concept, is not one of the core principles of the CIA triad and generally refers to the consistency and dependability of a system over time. Therefore, among the options given, integrity is clearly the correct choice in the context of preventing erroneous modifications of data.