Remember 3DES
Full name: Triple Data Encryption Standard
Memory aid: Three DES operations make Triple DES.
Triple DES is legacy and should be replaced by modern approved choices.
Study area: Cryptography & trust · Batch 3
Relevant study for: CompTIA Security+ SY0-701 · ISC2 CISSP 2024 outline · ISC2 SSCP · CompTIA SecurityX · Cybersecurity Architect SC-100 · ISC2 CCSP · Security, Compliance, and Identity Fundamentals SC-900
Practice with exam flashcards →Cybersecurity & Identity / Knowledge library
3DES — Triple Data Encryption Standard
Applies a DES-based construction multiple times.
Why learn 3DES — Triple Data Encryption Standard?
Applies a DES-based construction multiple times.
Where it came from
Triple DES is legacy and should be replaced by modern approved choices.
- Memory aid (a learning cue, not the expansion): Three DES operations make Triple DES.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand 3DES: Triple Data Encryption Standard.
- Recall this memory aid: Three DES operations make Triple DES.
- Explain the practical use: Applies a DES-based construction multiple times.
- Explain this distinction: Triple DES is legacy and should be replaced by modern approved choices.
- Identify 3DES in a device specification, architecture diagram, or system inventory.
Documentation and sources
- NIST cybersecurity glossary (csrc.nist.gov)