- Client to Authenticator Protocol
- Cloud Security Posture Management
- Cobalt Strike
- Cold Disaster Recovery Site
- Command and Control Server
- CRD
- Credential Hygiene
- Credentials
- Cron
- CVSS
- CyberAv3ngers
- Cybersecurity and Infrastructure Security Agency
- Daemon
- DanaBot
- Dangling Commit
- Dark Fiber
- Data Security Posture Management
- DDoS
- DeepSeek
- DES
- Dictionary Attack
- Diffie-Hellman
- Digest Authentication
- Digital Certificate
- Distribution as a Service