DOAJ Open Access 2025

Generalizations of ChiChi: Families of Low-Latency Permutations in Any Even Dimension

Samuele Andreoli Gregor Leander Enrico Piccione Lukas Stennes

Abstrak

At Eurocrypt’25, Belkheyar et al. introduced a new non-linear layer called ChiChi or χχ. ChiChi is built based on Daemen’s χ function, but crucially gives a permutation in even dimension divisible by four. In this work, we generalize their construction in multiple ways, prove their open conjecture regarding the algebraic degree of the inverse of ChiChi, and investigate the properties of it against key recovery attacks.

Topik & Kata Kunci

Computer engineering. Computer hardware

Penulis (4)

Samuele Andreoli

Gregor Leander

Enrico Piccione

Lukas Stennes

Format Sitasi

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Andreoli, S., Leander, G., Piccione, E., Stennes, L. (2025). Generalizations of ChiChi: Families of Low-Latency Permutations in Any Even Dimension. https://doi.org/10.46586/tosc.v2025.i3.800-826

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Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.46586/tosc.v2025.i3.800-826
Akses: Open Access ✓