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Preprint Sep 2026

Compressed Permutation Oracles Revisited

The compressed permutation oracle has been used to analyze the quantum security of a number of cryptographic constructions which resisted prior techniques. However, these analyses were fundamentally limited by the poor soundness of the method: the technique was proven sound only up to $O(N^{1/12})$ queries to permutati...

Joseph Carolan, Christian Majenz · 1 citation
Open access Sep 2026

RainHash2.0: Hardware- and Arithmetization-friendly Hash Function

Zero-knowledge (ZK) proof systems have developed rapidly in recent years, with hash functions as one of their central building blocks. Since these often dominate the prover cost, circuit-friendly hash function design has become an active research area. Most hash proposals target prime fields, although recent protocols...

Jia-Min Cui, Lorenzo Grassi, Katharina Koschatko et al. · 1 citation

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