The Patching Landscape of Elisabeth-4 and the Mixed Filter Permutator Paradigm

ePrint Report: The Patching Landscape of Elisabeth-4 and the Mixed Filter Permutator Paradigm

Clément Hoffmann, Pierrick Méaux, François-Xavier Standaert

Filter permutators are a family of stream cipher designs that are aimed for hybrid homomorphic encryption. While originally operating on bits, they have been generalized to groups at Asiacrypt 2022, and instantiated
for evaluation with the TFHE scheme which favors a filter based on (negacyclic) Look Up Tables (LUTs). A recent work of Gilbert et al., to appear at Asiacrypt 2023, …

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