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06/16/2022
Adaptive versus Static Multi-oracle Algorithms, and Quantum Security of a Split-key PRF
In the first part of the paper, we show a generic compiler that transfor...
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02/28/2022
Efficient NIZKs and Signatures from Commit-and-Open Protocols in the QROM
Commit-and-open Sigma-protocols are a popular class of protocols for con...
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03/04/2021
Online-Extractability in the Quantum Random-Oracle Model
We show the following generic result. Whenever a quantum query algorithm...
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10/22/2020
On the Compressed-Oracle Technique, and Post-Quantum Security of Proofs of Sequential Work
We revisit the so-called compressed oracle technique, introduced by Zhan...
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03/11/2020
The Measure-and-Reprogram Technique 2.0: Multi-Round Fiat-Shamir and More
We revisit recent works by Don, Fehr, Majenz and Schaffner and by Liu an...
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02/20/2019
Security of the Fiat-Shamir Transformation in the Quantum Random-Oracle Model
The famous Fiat-Shamir transformation turns any public-coin three-round ...
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10/02/2018