Extended Differential Cryptanalysis of Kuznyechik
The research introduced a novel 'inner c-differential' cryptanalysis technique to analyze Kuznyechik, a 9-round block cipher, without initial key whitening. This method overcomes structural limitations by modifying how the multiplication by 'c' affects the input, allowing for practical application. The analysis revealed statistically significant non-random biases across all round counts, with critical alerts found in the full 9-round version.