Cryptanalysis of CIKS-128 and CIKS-128H Suitable for Intelligent Multimedia and Ubiquitous Computing Systems

Authors

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

Keywords:

Intelligent multimedia and ubiquitous computing systems, encryption algorithms, CIKS-128, CIKS-128H, related-key differential characteristics

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 2^44, and 2^48 data/time complexities, respectively.

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Author Biographies

Changhoon Lee

School of Computer Engineering
Hanshin University, Republic of Korea

Jongsung Kim

Division of e-Business
Kyungnam University, Republic of Korea

Jaechul Sung

Department of Mathematics
University of Seoul, Republic of Korea

Yang Sun Lee

Department of Information and Communication Engineering
Chosun University, Republic of Korea

Chang Hoon Lee

Department of Computer Engineering
Hankyong National University, Republic of Korea

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Published

2012-01-26

How to Cite

Lee, C., Kim, J., Sung, J., Lee, Y. S., & Lee, C. H. (2012). Cryptanalysis of CIKS-128 and CIKS-128H Suitable for Intelligent Multimedia and Ubiquitous Computing Systems. COMPUTING AND INFORMATICS, 30(3), 447–466. Retrieved from http://www.cai.sk/ojs/index.php/cai/article/view/178

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Section

Special Section Articles