| Abbreviation | Definition |
|---|---|
| DESCBC | Data Encryption Standard/Cipher Block Chaining |
| DES-CBC | Data Encryption Standard - Cipher Block Chaining |
| DH | Diffie-Hellman |
| DHK | Diffie Hellman Knowledge |
| DHS | Deceptive Header Screening |
| DJ | Dumpster Jockey |
| DKAA | Distributed Kerberized Access Architecture |
| DKG | Decryption Key Generator |
| DLD | Default Logging Destination |
| DLF | Definable Logging Format |
| DLP | Data Leak Prevention |
| DLP | Data Loss Prevention |
| DLT | Direct Linear Transform |
| DMTC | Disaster Management Training Course |
| DMV | Document Macro Virus |
| DNSBL | Domain Name Server Block List |
| DNSSEC | Domain Name System SECurity Extensions |
| DNT | Do Not Track |
| DOG | Disaster Operations Group |
| DOWS | Duck Operated Warning System |