Related-key rectangle cryptanalysis of Rijndael-160 and Rijndael-192

Wang, Qingju;Gu, Dawu;Toz, Deniz;Varici, Kerem;Liu, Zhiqiang
(2015) IET Information Security — Vol. 9, n° 5, p. 266-276 (2015)

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Authors
  • Wang, QingjuShanghai Jiao Tong University
    Author
  • Gu, DawuUCLouvain
    Author
  • Toz, DenizShanghai Jiao Tong University
    Author
  • Varici, KeremShanghai Jiao Tong University
    Author
  • Liu, ZhiqiangShanghai Jiao Tong University
    Author
Abstract
In this study, the authors present the first related-key rectangle cryptanalysis of Rijndael-160/160 and Rijndael- 192/192. The author's attack on Rijndael-160/160 covers eight rounds. The attack complexities are 2126.5 chosen plaintexts, 2129.28 8-round Rijndael-160/160 encryptions and 2132.82 bytes. Their attack on Rijndael-192/192 covers ten rounds. It requires 2179 chosen plaintexts, 2181.09 10-round Rijndael-192/192 encryptions and 2185.59 bytes memory. These are the currently best cryptanalytic results on Rijndael-160/160 and Rijndael-192/192 in terms of the number of attacked rounds. Furthermore, their results show that the slow diffusion in the key schedule of Rijndael makes it a target for this type of analysis.
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Wang, Q., Gu, D., Toz, D., Varici, K., & Liu, Z. (2015). Related-key rectangle cryptanalysis of Rijndael-160 and Rijndael-192. IET Information Security, 9(5), 266-276. https://doi.org/10.1049/iet-ifs.2014.0380 (Original work published 2015)