Integrity
1. A state in which information has remained unaltered from the point it was produced by a source, during transmission, storage, and eventual receipt by the destination.
Source: Explore Terms: A Glossary of Common Cybersecurity Terminology, National Initiative for Cybersecurity Careers and Studies (NICCS), https://niccs.us-cert.gov/about-niccs/glossary
2. The guarding against improper information modification or destruction, and ensuring information non-repudiation and authenticity.
Source: Glossary of terms database, U.S. Election Assistance Commission, https://www.eac.gov/glossary/; U.S. Cyberspace Solarium Commission, March 2020, https://subscriber.politicopro.com/f/?id=00000170-c638-d8f7-a7f1-f63b33510000
4. The property whereby information, an information system, or a component of a system has not been modified or destroyed in an unauthorized manner.
Source: Explore Terms: A Glossary of Common Cybersecurity Terminology ,National Initiative for Cybersecurity Careers and Studies (NICCS), https://niccs.us-cert.gov/about-niccs/glossary