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03/18/2022
Failing gracefully: Decryption failures and the Fujisaki-Okamoto transform
In known security reductions for the Fujisaki-Okamoto transformation, de...
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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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05/04/2021
A Guide for New Program Committee Members at Theoretical Computer Science Conferences
In theoretical computer science, conferences play an important role in t...
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03/26/2021
Limitations on Uncloneable Encryption and Simultaneous One-Way-to-Hiding
We study uncloneable quantum encryption schemes for classical messages a...
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03/23/2021
Quantum-access security of the Winternitz one-time signature scheme
Quantum-access security, where an attacker is granted superposition acce...
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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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10/28/2020
Tight adaptive reprogramming in the QROM
The random oracle model (ROM) enjoys widespread popularity, mostly becau...
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09/29/2020
Quantum copy-protection of compute-and-compare programs in the quantum random oracle model
Copy-protection allows a software distributor to encode a program in suc...
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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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11/15/2019
Weak approximate unitary designs and applications to quantum encryption
Unitary t-designs are the bread and butter of quantum information theory...
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10/13/2019
Efficient simulation of random states and random unitaries
We consider the problem of efficiently simulating random quantum states ...
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09/30/2019
Secure Multi-party Quantum Computation with a Dishonest Majority
The cryptographic task of secure multi-party (classical) computation has...
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05/14/2019
Non-malleability for quantum public-key encryption
Non-malleability is an important security property for public-key encryp...
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04/25/2019
Quantum Lazy Sampling and Game-Playing Proofs for Quantum Indifferentiability
Game-playing proofs constitute a powerful framework for classical crypto...
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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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11/28/2018
Can you sign a quantum state?
Cryptography with quantum states exhibits a number of surprising and cou...
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10/30/2018
Constraints on Multipartite Quantum Entropies
The von Neumann entropy plays a vital role in quantum information theory...
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10/24/2018
Entropy in Quantum Information Theory -- Communication and Cryptography
In this Thesis, several results in quantum information theory are collec...
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08/01/2018
Conditional Decoupling of Quantum Information
Insights from quantum information theory show that correlation measures ...
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03/10/2018