Integrity

Guarding against improper information modification or destruction, and includes ensuring information non-repudiation and authenticity.
SOURCE: SP 800-53; SP 800-53A; SP 800-18; SP 800-27; SP 80037; SP 800-60; FIPS 200; FIPS 199; 44 U.S.C., Sec. 3542

The property that sensitive data has not been modified or deleted in an unauthorized and undetected manner.
SOURCE: FIPS 140-2

The property whereby an entity has not been modified in an unauthorized manner.
SOURCE: CNSSI-4009