Improving Integral Cryptanalysis against Rijndael with Large Blocks

Details Improving Integral Cryptanalysis against Rijndael with Large Blocks Improving Integral Cryptanalysis against Rijndael with Large Blocks

2009-10-12

arxiv.org/abs/0910.2153v1

Computer Science

Cryptography and Security

Scientific paper

This report presents new four-round integral properties against the Rijndael cipher with block sizes larger than 128 bits. Using higher-order multiset distinguishers and other well-known extensions of those properties, the deduced attacks reach up to 7 and 8 rounds of Rijndael variants with 160 up to 256-bit blocks. For example, a 7-rounds attack against Rijndael-224 has a time complexity equal to $2^{80}$.

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