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cs.CR2026
Indistinguishability Lifting for Keyed Oracles, Compressed Ideal Cipher, and More Applications
Ritam Bhaumik, Yu-Hsuan Huang
Cryptographic security proofs often involve an adversary interacting with a larger, keyed oracle that consists of (potentially exponentially) many independent instances of a smalle…
cs.CR2022
Adaptive versus Static Multi-oracle Algorithms, and Quantum Security of a Split-key PRF
Jelle Don, Serge Fehr, Yu-Hsuan Huang
In the first part of the paper, we show a generic compiler that transforms any oracle algorithm that can query multiple oracles adaptively, i.e., can decide on which oracle to quer…
cs.CR2021★ 1 cited
Isogeny-based Group Signatures and Accountable Ring Signatures in QROM
Kai-Min Chung, Yao-Ching Hsieh, Mi-Ying Huang +3
We present the first provably secure isogeny-based group signature (GS) and accountable ring signature (ARS) in the quantum random oracle model (QROM). We do so via introducing and…