Triple DES

nounverified·updated May 9, 2026

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An implementation of the Data Encryption Standard (DES) algorithm that uses three passes of the DES algorithm instead of one as used in ordinary DES applications. Triple DES provides much stronger encryption than ordinary DES but it is less secure than AES.

MWENISTIR 7298: Glossary of Key Information Security Terms, Revision 2

Senses

2 more senses beyond the canonical

SANS Glossary of Security Terms

A block cipher, based on DES, that transforms each 64-bit plaintext block by applying the Data Encryption Algorithm three successive times, using either two or three different keys, for an effective key length of 112 or 168 bits.

ISACA Cybersecurity Glossary

A block cipher created from the Data Encryption Standard (DES) cipher by using it three times

Classifications

per-axis with provenance

Entity Type

Control85%llm-generatedllm:claude-haiku-4-5

?unassignedlast reviewed —

Sensitivity

unclassified

Information Class

unclassified

Variants

3 surface forms

acronym: 3DES
possessive: Triple DES's
pluralpossessive: Triple DESES'

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