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Impossible-Differential Attacks on Large-Block Rijndael

2007; Springer Science+Business Media; Linguagem: Inglês

10.1007/978-3-540-75496-1_7

1611-3349

Jorge Nakahara, Ivan Carlos Pavão,

Advanced Malware Detection Techniques

This paper reports impossible-differential (ID) attacks on reduced-round versions of the Rijndael cipher with text blocks larger than 128 bits. These attacks follow the framework of the attacks by Biham-Keller and Cheon et al. on the AES, and reach up to seven rounds of large-block Rijndael variants. Even though these ciphers are not standardized as FIPS, like the AES, it is important to evaluate the security of the other Rijndael versions since they provide larger internal states when used as primitives for the construction of stream ciphers and hash functions. The main contributions of this paper are longer ID distinguishers found for large-block Rijndael versions, compared to the ones used for the AES.