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4 papers · 1 filter
Predicting Module-Lattice Reduction
Léo Ducas, Lynn Engelberts, Paola de Perthuis
Is module-lattice reduction better than unstructured lattice reduction? This question was highlighted as 'Q8' in the Kyber NIST standardization submission (Avanzi et al., 2021), as…
The Measure-and-Reprogram Technique 2.0: Multi-Round Fiat-Shamir and More
Jelle Don, Serge Fehr, Christian Majenz
We revisit recent works by Don, Fehr, Majenz and Schaffner and by Liu and Zhandry on the security of the Fiat-Shamir transformation of -protocols in the quantum random oracle mo…
Security of the Fiat-Shamir Transformation in the Quantum Random-Oracle Model
Jelle Don, Serge Fehr, Christian Majenz +1
The famous Fiat-Shamir transformation turns any public-coin three-round interactive proof, i.e., any so-called sigma-protocol, into a non-interactive proof in the random-oracle mod…
Semantic Security and Indistinguishability in the Quantum World
Tommaso Gagliardoni, Andreas Hülsing, Christian Schaffner
At CRYPTO 2013, Boneh and Zhandry initiated the study of quantum-secure encryption. They proposed first indistinguishability definitions for the quantum world where the actual indi…