Alexander Koch

According to our database, Alexander Koch authored at least 22 papers between 2013 and 2024.

Collaborative distances:

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

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

IACR Cryptol. ePrint Arch., 2024

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

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

IACR Cryptol. ePrint Arch., 2024

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

Robin Berger, Felix Dörre, Alexander Koch

IACR Cryptol. ePrint Arch., 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

IACR Cryptol. ePrint Arch., 2023

2022

Private Function Evaluation with Cards.

Alexander Koch, Stefan Walzer

New Gener. Comput., 2022

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

Card-Based Cryptography Meets Formal Verification.

Alexander Koch, Michael Schrempp, Michael Kirsten

New Gener. Comput., 2021

Black-Box Accumulation Based on Lattices.

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

IACR Cryptol. ePrint Arch., 2021

The Landscape of Security from Physical Assumptions¹.

Alexander Koch

Proceedings of the IEEE Information Theory Workshop, 2021

2020

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

IACR Cryptol. ePrint Arch., 2020

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

IACR Cryptol. ePrint Arch., 2019

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

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

IACR Cryptol. ePrint Arch., 2017

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

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

IACR Cryptol. ePrint Arch., 2017

Foundations for Actively Secure Card-based Cryptography.

Alexander Koch, Stefan Walzer

IACR Cryptol. ePrint Arch., 2017

2016

Fault-Tolerant Aggregate Signatures.

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

IACR Cryptol. ePrint Arch., 2016

2015

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

Alexander Koch, Stefan Walzer, Kevin Härtel

IACR Cryptol. ePrint Arch., 2015

2013

Graphs with Plane Outside-Obstacle Representations.

Alexander Koch, Marcus Krug, Ignaz Rutter

CoRR, 2013