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.

Keywords

Cite this article

@article{cai-11085,
  author  = {Changhoon Lee and Jongsung Kim and Jaechul Sung and Yang-Sun Lee and Chang Hoon Lee},
  title   = {Cryptanalysis of CIKS-128 and CIKS-128H Suitable for Intelligent Multimedia and Ubiquitous Computing Systems},
  journal = {Computing and Informatics},
  volume  = {30},
  number  = {3},
  pages   = {447--466},
  year    = {2011},
  issn    = {1335-9150},
  url     = {https://cai.type.sk/content/2011/3/cryptanalysis-of-ciks-128-and-ciks-128h-suitable-for-intelligent-multimedia-and-ubiquitous-computing-systems/}
}
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