Related‐key rectangle cryptanalysis of Rijndael‐160 and Rijndael‐192. Issue 5 (1st September 2015)

• Record Type: Journal Article
• Authors: Wang, Qingju; Liu, Zhiqiang; Toz, Deniz; Varici, Kerem; Gu, Dawu
• Is Part Of: IET information security. Volume 9:Issue 5(2015)
• Page Start: 266
• Page End: 276
• Publication Date: 2015-09-01
• Subjects: cryptography -- computational complexity; related‐key rectangle cryptanalysis -- attack complexities -- encryptions -- Rijndael‐192/192 -- Rijndael‐160/160; Computer security -- Periodicals; Cryptography -- Periodicals; Computer networks -- Security measures -- Periodicals; Database security -- Periodicals; 005.8
• DOI: 10.1049/iet-ifs.2014.0380
• Languages: English
• ISSNs: 1751-8709

Abstract

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 2 126.5 chosen plaintexts, 2 129.28 8‐round Rijndael‐160/160 encryptions and 2 132.82 bytes. Their attack on Rijndael‐192/192 covers ten rounds. It requires 2 179 chosen plaintexts, 2 181.09 10‐round Rijndael‐192/192 encryptions and 2 185.59 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.