Secure telecommunications or information system, or associated cryptographic component, that is unclassified and handled through the COMSEC material control system (CMCS), an equivalent material control system, or a combination of the two that provides accountability and visibility. Such items are marked "Controlled Cryptographic Item," or, where space is limited, "CCI".
Sources:
CNSSI 4009-2022
from
CNSSI 4001 - adapted