Christian Schaffner

According to our database, Christian Schaffner authored at least 50 papers between 2005 and 2025.

Collaborative distances:

• Dijkstra number of three.
• Erdős number of three.

2025

Parallel repetition of local simultaneous state discrimination.

Llorenç Escolà-Farràs, Jaròn Has, Maris Ozols, Christian Schaffner, Mehrdad Tahmasbi

Quantum, 2025

QKD Oracles for Authenticated Key Exchange.

Kathrin Hövelmanns, Daan Planken, Christian Schaffner, Sebastian R. Verschoor

IACR Cryptol. ePrint Arch., 2025

2022

Optimal Design of Time-of-Use Tariffs using Bilevel Optimization.

Ashwin Venkatraman, Gabriela Hug, Christian Schaffner, Marina González Vayá

Proceedings of the IEEE PES Innovative Smart Grid Technologies Conference Europe, 2022

Online-Extractability in the Quantum Random-Oracle Model.

Jelle Don, Serge Fehr, Christian Majenz, Christian Schaffner

Proceedings of the Advances in Cryptology - EUROCRYPT 2022 - 41st Annual International Conference on the Theory and Applications of Cryptographic Techniques, Trondheim, Norway, May 30, 2022

Efficient NIZKs and Signatures from Commit-and-Open Protocols in the QROM.

Jelle Don, Serge Fehr, Christian Majenz, Christian Schaffner

Proceedings of the Advances in Cryptology - CRYPTO 2022, 2022

2021

Limitations on Uncloneable Encryption and Simultaneous One-Way-to-Hiding.

Christian Majenz, Christian Schaffner, Mehrdad Tahmasbi

IACR Cryptol. ePrint Arch., 2021

A Guide for New Program Committee Members at Theoretical Computer Science Conferences.

Yfke Dulek, Stacey Jeffery, Christian Majenz, Christian Schaffner, Florian Speelman, Ronald de Wolf

CoRR, 2021

Impossibility of Quantum Virtual Black-Box Obfuscation of Classical Circuits.

Gorjan Alagic, Zvika Brakerski, Yfke Dulek, Christian Schaffner

Proceedings of the Advances in Cryptology - CRYPTO 2021, 2021

2020

Non-interactive Cryptographic Timestamping Based on Verifiable Delay Functions.

Esteban Landerreche, Marc Stevens, Christian Schaffner

Proceedings of the Financial Cryptography and Data Security, 2020

Secure Multi-party Quantum Computation with a Dishonest Majority.

Yfke Dulek, Alex B. Grilo, Stacey Jeffery, Christian Majenz, Christian Schaffner

Proceedings of the Advances in Cryptology - EUROCRYPT 2020, 2020

2019

Non-malleability for quantum public-key encryption.

Christian Majenz, Christian Schaffner, Jeroen van Wier

IACR Cryptol. ePrint Arch., 2019

Quantum Lazy Sampling and Game-Playing Proofs for Quantum Indifferentiability.

Jan Czajkowski, Christian Majenz, Christian Schaffner, Sebastian Zur

IACR Cryptol. ePrint Arch., 2019

Security of the Fiat-Shamir Transformation in the Quantum Random-Oracle Model.

Jelle Don, Serge Fehr, Christian Majenz, Christian Schaffner

Proceedings of the Advances in Cryptology - CRYPTO 2019, 2019

Quantum Indistinguishability of Random Sponges.

Jan Czajkowski, Andreas Hülsing, Christian Schaffner

Proceedings of the Advances in Cryptology - CRYPTO 2019, 2019

2018

Quantum Homomorphic Encryption for Polynomial-Size Circuits.

Yfke Dulek, Christian Schaffner, Florian Speelman

Theory Comput., 2018

Post-quantum Security of the Sponge Construction.

Jan Czajkowski, Leon Groot Bruinderink, Andreas Hülsing, Christian Schaffner, Dominique Unruh

Proceedings of the Post-Quantum Cryptography - 9th International Conference, 2018

A Concrete Treatment of Fiat-Shamir Signatures in the Quantum Random-Oracle Model.

Eike Kiltz, Vadim Lyubashevsky, Christian Schaffner

Proceedings of the Advances in Cryptology - EUROCRYPT 2018 - 37th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Tel Aviv, Israel, April 29, 2018

2017

Using Simon's algorithm to attack symmetric-key cryptographic primitives.

Thomas Santoli, Christian Schaffner

Quantum Inf. Comput., 2017

Quantum Fully Homomorphic Encryption with Verification.

Gorjan Alagic, Yfke Dulek, Christian Schaffner, Florian Speelman

Proceedings of the Advances in Cryptology - ASIACRYPT 2017, 2017

2016

Computational Security of Quantum Encryption.

Gorjan Alagic, Anne Broadbent, Bill Fefferman, Tommaso Gagliardoni, Christian Schaffner, Michael St. Jules

Proceedings of the Information Theoretic Security - 9th International Conference, 2016

Semantic Security and Indistinguishability in the Quantum World.

Tommaso Gagliardoni, Andreas Hülsing, Christian Schaffner

Proceedings of the Advances in Cryptology - CRYPTO 2016, 2016

Quantum Homomorphic Encryption for Polynomial-Sized Circuits.

Yfke Dulek, Christian Schaffner, Florian Speelman

Proceedings of the Advances in Cryptology - CRYPTO 2016, 2016

2015

Multiparty Zero-Error Classical Channel Coding With Entanglement.

Teresa Piovesan, Giannicola Scarpa, Christian Schaffner

IEEE Trans. Inf. Theory, 2015

Quantum Cryptography Beyond Quantum Key Distribution.

Anne Broadbent, Christian Schaffner

IACR Cryptol. ePrint Arch., 2015

Quantifying the Leakage of Quantum Protocols for Classical Two-Party Cryptography.

Louis Salvail, Christian Schaffner, Miroslava Sotáková

CoRR, 2015

2014

On the Parallel Repetition of Multi-Player Games: The No-Signaling Case.

Harry Buhrman, Serge Fehr, Christian Schaffner

Proceedings of the 9th Conference on the Theory of Quantum Computation, 2014

2013

The garden-hose model.

Harry Buhrman, Serge Fehr, Christian Schaffner, Florian Speelman

Proceedings of the Innovations in Theoretical Computer Science, 2013

2012

Complete Insecurity of Quantum Protocols for Classical Two-Party Computation

Harry Buhrman, Matthias Christandl, Christian Schaffner

CoRR, 2012

An All-But-One Entropic Uncertainty Relation, and Application to Password-Based Identification.

Niek J. Bouman, Serge Fehr, Carlos González-Guillén, Christian Schaffner

Proceedings of the Theory of Quantum Computation, 2012

2011

Position-Based Quantum Cryptography.

Harry Buhrman, Serge Fehr, Christian Schaffner

ERCIM News, 2011

Security and Composability of Randomness Expansion from Bell Inequalities

Serge Fehr, Ran Gelles, Christian Schaffner

CoRR, 2011

The Garden-Hose Game: A New Model of Computation, and Application to Position-Based Quantum Cryptography

Harry Buhrman, Serge Fehr, Christian Schaffner, Florian Speelman

CoRR, 2011

Position-Based Quantum Cryptography: Impossibility and Constructions.

Harry Buhrman, Nishanth Chandran, Serge Fehr, Ran Gelles, Vipul Goyal, Rafail Ostrovsky, Christian Schaffner

Proceedings of the Advances in Cryptology - CRYPTO 2011, 2011

Random Oracles in a Quantum World.

Dan Boneh, Özgür Dagdelen, Marc Fischlin, Anja Lehmann, Christian Schaffner, Mark Zhandry

Proceedings of the Advances in Cryptology - ASIACRYPT 2011, 2011

2010

Random Oracles in a Quantum World

Özgür Dagdelen, Marc Fischlin, Anja Lehmann, Christian Schaffner

CoRR, 2010

Leftover Hashing against quantum side information.

Marco Tomamichel, Renato Renner, Christian Schaffner, Adam D. Smith

Proceedings of the IEEE International Symposium on Information Theory, 2010

2009

The operational meaning of min- and max-entropy.

Robert König, Renato Renner, Christian Schaffner

IEEE Trans. Inf. Theory, 2009

Robust cryptography in the noisy-quantum-storage model.

Christian Schaffner, Barbara M. Terhal, Stephanie Wehner

Quantum Inf. Comput., 2009

Composing Quantum Protocols in a Classical Environment.

Serge Fehr, Christian Schaffner

Proceedings of the Theory of Cryptography, 6th Theory of Cryptography Conference, 2009

Improving the Security of Quantum Protocols via Commit-and-Open.

Ivan Damgård, Serge Fehr, Carolin Lunemann, Louis Salvail, Christian Schaffner

Proceedings of the Advances in Cryptology, 2009

On the Power of Two-Party Quantum Cryptography.

Louis Salvail, Christian Schaffner, Miroslava Sotáková

Proceedings of the Advances in Cryptology, 2009

2008

Randomness Extraction Via <i>delta</i> -Biased Masking in the Presence of a Quantum Attacker.

Serge Fehr, Christian Schaffner

Proceedings of the Theory of Cryptography, Fifth Theory of Cryptography Conference, 2008

2007

Randomness Extraction via Delta-Biased Masking in the Presence of a Quantum Attacker.

Serge Fehr, Christian Schaffner

IACR Cryptol. ePrint Arch., 2007

Cryptography from Noisy Photonic Storage

Stephanie Wehner, Christian Schaffner, Barbara M. Terhal

CoRR, 2007

Cryptography in the Bounded-Quantum-Storage Model

Christian Schaffner

CoRR, 2007

Secure Identification and QKD in the Bounded-Quantum-Storage Model.

Ivan Damgård, Serge Fehr, Louis Salvail, Christian Schaffner

Proceedings of the Advances in Cryptology, 2007

A Tight High-Order Entropic Quantum Uncertainty Relation with Applications.

Ivan Damgård, Serge Fehr, Renato Renner, Louis Salvail, Christian Schaffner

Proceedings of the Advances in Cryptology, 2007

2006

Information-Theoretic Conditions for Two-Party Secure Function Evaluation.

Claude Crépeau, George Savvides, Christian Schaffner, Jürg Wullschleger

Proceedings of the Advances in Cryptology - EUROCRYPT 2006, 25th Annual International Conference on the Theory and Applications of Cryptographic Techniques, St. Petersburg, Russia, May 28, 2006

Oblivious Transfer and Linear Functions.

Ivan Damgård, Serge Fehr, Louis Salvail, Christian Schaffner

Proceedings of the Advances in Cryptology, 2006

2005

Cryptography in the bounded quantum-storage model.

Ivan Bjerre Damgård, Serge Fehr, Louis Salvail, Christian Schaffner

Proceedings of the IEEE Information Theory Workshop on Theory and Practice in Information-Theoretic Security, 2005