Cryptanalysis of CIKS-128 and CIKS-128H suitable for intelligent multimedia and ubiquitous computing systems

Changhoon Lee, Jongsung Kim, Jaechul Sung, Yang Sun Lee, Chang Hoon Lee

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Recently, data-dependent permutations (DDP) that are very suitable for intelligent multimedia and ubiquitous computing systems have been introduced as a new cryptographic primitive for the design of fast encryption systems. The CIKS-128 and CIKS-128H block ciphers are the typical examples of DDP-based encryption algorithms. In this paper, we show that CIKS-128 and CIKS-128H are vulnerable to related-key differential attacks. We first describe how to construct their full-round related-key differential characteristics with high probabilities and then we exploit them to break the full-round CIKS-128 and CIKS-128H with 244, and 248 data/time complexities, respectively.

Original languageEnglish
Pages (from-to)447-466
Number of pages20
JournalComputing and Informatics
Volume30
Issue number3
StatePublished - 2011

Keywords

  • CIKS-128
  • CIKS-128H
  • Encryption algorithms
  • Intelligent multimedia and ubiquitous computing systems
  • Related-key differential characteristics

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