| Abbreviation | Definition |
|---|---|
| CKT | Cyber Knights Templar |
| CLAE | Certificate-Less Authenticated Encryption |
| CLLA | Cyber Living Lab Accelerator |
| CLMEI | Cyber Link Multichannel Environment Impression |
| CLSD | Certified Lodging Security Director |
| CLSP | Cyber Leader Scholars Program |
| CMEK | Customer managed encryption keys |
| CMPPA | Computer Matching and Privacy Protection Act of 1988 |
| CNCI | Comprehensive National Cybersecurity Initiative |
| CNL | Cyber Navigator Loid |
| CNMF | Cyber National Mission Force |
| CNS | Communications and Network Security |
| CNSG | Cyber Network Security Group |
| CNSL | Center for National Security Law |
| CNSP | Corero Network Security PLC |
| CNW | Cyber and Netcentric Workshop |
| COLL | Corners Of the Last Layer |
| COMMAS | Central Operations; Managing, Monitoring, Assisting, and Stabilizing |
| COMPUSEC | COMPUter SECurity |
| COMSEC | COMmunications SECurity |