Preprint
Sep 2026
Indistinguishability of Sum of Permutations: A Fourier Analytic Route to Classical and Quantum Security
A unified Fourier analytic treatment of Dinur's variable-output single-permutation construction, $\mathsf{LXoP}$, for every fixed output width, and derive its classical and quantum security bounds; for one- and two-block outputs, they give concrete quantum security bounds.
Ritam Bhaumik, Chun Guo, Xiao-Ning Guo et al.
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