A qualitative measure of the importance of the information based upon factors such as the level of robustness of security controls allocated to the protection of information based upon: mission criticality, the sensitivity (e.g., classification and compartmentalization) of the information, releasability or privacy requirements, perishability/longevity of the information (e.g., short life data versus long life intelligence source data), and potential impact of loss of confidentiality and integrity and/or availability of the information.
Sources:
CNSSI 4009-2022