Ensuring that information is a true and accurate representation of data. It is also the prevention of unauthorized modification or destruction, of information.
Integrity is the second component of the CIA Triad. Integrity is all about making sure that files are accurate and unaltered. Incorrect data tends to accumulate over time, and organizations should have policies to periodically review and correct old data that may have become outdated. One of the most damaging things that a hacker could do is to alter critical information in order to conduct sabotage. Imagine if in a nuclear power plant, the temperature gauges were altered so as to misread the correct temperature and allow the reactor to overheat: the results could be catastrophic!