Alexander Koch

According to our database, Alexander Koch authored at least 23 papers between 2013 and 2025.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2025

The Quantum Decoherence Model: Everlasting Composable Secure Computation and More.

Nico Döttling, Alexander Koch, Sven Maier, Jeremias Mechler, Anne Müller, Jörn Müller-Quade, Marcel Tieplet

IACR Cryptol. ePrint Arch., 2025

2024

Efficient Card-Based ZKP for Single Loop Condition and Its Application to Moon-or-Sun.

Samuel D. Hand, Alexander Koch, Pascal Lafourcade, Daiki Miyahara, Léo Robert

New Gener. Comput., September, 2024

LaPSuS - A Lattice-Based Private Stream Aggregation Scheme Under Scrutiny.

Johannes Ottenhues, Alexander Koch

Proceedings of the Security and Cryptography for Networks - 14th International Conference, 2024

QuietOT: Lightweight Oblivious Transfer with a Public-Key Setup.

Geoffroy Couteau, Lalita Devadas, Srinivas Devadas, Alexander Koch, Sacha Servan-Schreiber

Proceedings of the Advances in Cryptology - ASIACRYPT 2024, 2024

Two-Party Decision Tree Training from Updatable Order-Revealing Encryption.

Robin Berger, Felix Dörre, Alexander Koch

Proceedings of the Applied Cryptography and Network Security, 2024

2023

Check Alternating Patterns: A Physical Zero-Knowledge Proof for Moon-or-Sun.

Samuel D. Hand, Alexander Koch, Pascal Lafourcade, Daiki Miyahara, Léo Robert

Proceedings of the Advances in Information and Computer Security, 2023

2021

Private Stream Aggregation with Labels in the Standard Model.

Johannes Ernst, Alexander Koch

Proc. Priv. Enhancing Technol., 2021

Fortified Multi-Party Computation: Taking Advantage of Simple Secure Hardware Modules.

Brandon Broadnax, Alexander Koch, Jeremias Mechler, Tobias Müller, Jörn Müller-Quade, Matthias Nagel

Proc. Priv. Enhancing Technol., 2021

The Landscape of Security from Physical Assumptions¹.

Alexander Koch

Proceedings of the IEEE Information Theory Workshop, 2021

Black-Box Accumulation Based on Lattices.

Sebastian H. Faller, Pascal Baumer, Michael Klooß, Alexander Koch, Astrid Ottenhues, Markus Raiber

Proceedings of the Cryptography and Coding - 18th IMA International Conference, 2021

Foundations for Actively Secure Card-Based Cryptography.

Alexander Koch, Stefan Walzer

Proceedings of the 10th International Conference on Fun with Algorithms, 2021

ConTra Corona: Contact Tracing against the Coronavirus by Bridging the Centralized-Decentralized Divide for Stronger Privacy.

Wasilij Beskorovajnov, Felix Dörre, Gunnar Hartung, Alexander Koch, Jörn Müller-Quade, Thorsten Strufe

Proceedings of the Advances in Cryptology - ASIACRYPT 2021, 2021

2019

Cryptographic Protocols from Physical Assumptions.

Alexander Koch

PhD thesis, 2019

Your Money or Your Life - Modeling and Analyzing the Security of Electronic Payment in the UC Framework.

Dirk Achenbach, Roland Gröll, Timon Hackenjos, Alexander Koch, Bernhard Löwe, Jeremias Mechler, Jörn Müller-Quade, Jochen Rill

Proceedings of the Financial Cryptography and Data Security, 2019

Card-Based Cryptography Meets Formal Verification.

Alexander Koch, Michael Schrempp, Michael Kirsten

Proceedings of the Advances in Cryptology - ASIACRYPT 2019, 2019

2018

Private Function Evaluation with Cards.

Alexander Koch, Stefan Walzer

IACR Cryptol. ePrint Arch., 2018

The Landscape of Optimal Card-based Protocols.

Alexander Koch

IACR Cryptol. ePrint Arch., 2018

Fortified Universal Composability: Taking Advantage of Simple Secure Hardware Modules.

Brandon Broadnax, Alexander Koch, Jeremias Mechler, Tobias Müller, Jörn Müller-Quade, Matthias Nagel

IACR Cryptol. ePrint Arch., 2018

2017

Practical and Robust Secure Logging from Fault-Tolerant Sequential Aggregate Signatures.

Gunnar Hartung, Björn Kaidel, Alexander Koch, Jessica Koch, Dominik Hartmann

Proceedings of the Provable Security, 2017

The Minimum Number of Cards in Practical Card-Based Protocols.

Julia Kastner, Alexander Koch, Stefan Walzer, Daiki Miyahara, Yu-ichi Hayashi, Takaaki Mizuki, Hideaki Sone

Proceedings of the Advances in Cryptology - ASIACRYPT 2017, 2017

2016

Fault-Tolerant Aggregate Signatures.

Gunnar Hartung, Björn Kaidel, Alexander Koch, Jessica Koch, Andy Rupp

Proceedings of the Public-Key Cryptography - PKC 2016, 2016

2015

Card-Based Cryptographic Protocols Using a Minimal Number of Cards.

Alexander Koch, Stefan Walzer, Kevin Härtel

Proceedings of the Advances in Cryptology - ASIACRYPT 2015 - 21st International Conference on the Theory and Application of Cryptology and Information Security, Auckland, New Zealand, November 29, 2015

2013

Graphs with Plane Outside-Obstacle Representations.

Alexander Koch, Marcus Krug, Ignaz Rutter

CoRR, 2013