Correlation Cube Attack Revisited: Improved Cube Search and Superpoly Recovery Techniques

ePrint Report: Correlation Cube Attack Revisited: Improved Cube Search and Superpoly Recovery Techniques

Jianhua Wang, Lu Qin, Baofeng Wu

In this paper, we improve the cube attack by exploiting low-degree factors of the superpoly w.r.t. certain "special" index set of cube (ISoC). This can be viewed as a special case of the correlation cube attack proposed at Eurocrypt 2018, but under our framework more beneficial equations on the key variables can be obtained in the key-recovery phase. To mount our …

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