Improved meet-in-the-middle attacks on reduced-round des

Orr Dunkelman, Gautham Sekar, Bart Preneel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The Data Encryption Standard (DES) is a 64-bit block cipher. Despite its short key size of 56 bits, DES continues to be used to protect financial transactions valued at billions of Euros. In this paper, we investigate the strength of DES against attacks that use a limited number of plaintexts and ciphertexts. By mounting meet-in-the-middle attacks on reduced-round DES, we find that up to 6-round DES is susceptible to this kind of attacks. The results of this paper lead to a better understanding on the way DES can be used.

Original languageEnglish
Title of host publicationProgress in Cryptology - INDOCRYPT 2007 - 8th International Conference on Cryptology in India, Proceedings
PublisherSpringer Verlag
Number of pages15
ISBN (Print)9783540770251
StatePublished - 2007
Externally publishedYes
Event8th Annual International Conference on Cryptolology in India, INDOCRYPT 2007 - Chennai, India
Duration: 9 Dec 200713 Dec 2007

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4859 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference8th Annual International Conference on Cryptolology in India, INDOCRYPT 2007

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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