Confidentiality

Preserving authorized restrictions on information access and disclosure, including means for protecting personal privacy and proprietary information.
SOURCE: SP 800-53; SP 800-53A; SP 800-18; SP 800-27; SP 800-60; SP 800-37; FIPS 200; FIPS 199; 44 U.S.C., Sec. 3542

The property that sensitive information is not disclosed to unauthorized individuals, entities, or processes.
SOURCE: FIPS 140-2

The property that information is not disclosed to system entities (users, processes, devices) unless they have been authorized to access the information.
SOURCE: CNSSI-4009