Guarding against improper information modification or destruction, and includes ensuring information non-repudiation and authenticity.
Sources:
CNSSI 4009-2015 under integrity from 44 U.S.C., Sec. 3542
NIST SP 800-172 under integrity from 44 U.S.C., Sec. 3552
NIST SP 800-172A under integrity from 44 U.S.C., Sec. 3552
NIST SP 800-37 Rev. 2 under integrity from 44 U.S.C., Sec. 3552
NIST SP 800-53 Rev. 5 under integrity from PL 113-283 (FISMA)
NIST SP 800-53A Rev. 5 under integrity from PL 113-283 (FISMA)
NIST SP 800-53B under integrity from PL 113-283 (FISMA)
NIST SP 800-171 Rev. 2 under integrity from 44 U.S.C., Sec. 3552

  Quality of being complete and unaltered.
Sources:
NIST SP 800-160v1r1 under integrity

  The property that data or information have not been altered or destroyed in an unauthorized manner.
Sources:
NIST SP 800-66r2 under integrity from HIPAA Security Rule - §164.304

  A measure of the trust that can be placed in the correctness of the information supplied by a PNT service provider. Integrity includes the ability of the system to provide timely warnings to users when the PNT data should not be used.
Sources:
NIST IR 8323r1 under integrity from USG FRP (2021)
NIST IR 8401 under integrity from USG FRP (2019)

  A measure of the trust that can be placed in the correctness of the information supplied by an HSN service provider. Integrity includes the ability of the system to provide timely warnings to users when the HSN data should not be used.
Sources:
NIST IR 8441 under integrity from USG FRP (2021)