The KIV-7 has storage for up to 10 traffic encryption keys, which simplifies multinet communications. A removable cryptographic ignition key (CIK) prevents unauthorized access and protects all internally stored keys. The KIV-7 fill interface is compatible with both DS-101 (AN/CYZ-10 Data Transfer Device [DTD]) and DS-102 (KYK-13, KYX-15, KOI-18) common fill devices. When unkeyed or when the CIK is removed; and not collocated, the KIV-7 is handled as an UNCLASSIFIED controlled cryptographic item (CCI). When the KIV-7 is keyed, it is handled at the classification level of the highest level of stored key.