Graphs with Plane Outside-Obstacle Representations. - Alexander Koch 001; Marcus Krug; Ignaz Rutter (CoRR, 2013)

Card-based Cryptographic Protocols Using a Minimal Number of Cards. - Alexander Koch 001; Stefan Walzer; Kevin Härtel (IACR Cryptol. ePrint Arch., 2015)

Fault-Tolerant Aggregate Signatures. - Gunnar Hartung; Björn Kaidel; Alexander Koch 001; Jessica Koch; Andy Rupp (IACR Cryptol. ePrint Arch., 2016)

Foundations for Actively Secure Card-based Cryptography. - Alexander Koch 001; Stefan Walzer (IACR Cryptol. ePrint Arch., 2017)

Practical and Robust Secure Logging from Fault-Tolerant Sequential Aggregate Signatures. - Gunnar Hartung; Björn Kaidel; Alexander Koch 001; Jessica Koch; Dominik Hartmann (IACR Cryptol. ePrint Arch., 2017)

The Minimum Number of Cards in Practical Card-based Protocols. - Julia Kastner; Alexander Koch 001; Stefan Walzer; Daiki Miyahara; Yu-ichi Hayashi; Takaaki Mizuki; Hideaki Sone (IACR Cryptol. ePrint Arch., 2017)

Fortified Universal Composability: Taking Advantage of Simple Secure Hardware Modules. - Brandon Broadnax; Alexander Koch 001; Jeremias Mechler; Tobias Müller 005; Jörn Müller-Quade; Matthias Nagel 001 (IACR Cryptol. ePrint Arch., 2018)

The Landscape of Optimal Card-based Protocols. - Alexander Koch 001 (IACR Cryptol. ePrint Arch., 2018)

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 001; Bernhard Löwe; Jeremias Mechler; Jörn Müller-Quade; Jochen Rill (IACR Cryptol. ePrint Arch., 2019)

Cryptographic Protocols from Physical Assumptions. - Alexander Koch 001 (2019)

ConTra Corona: Contact Tracing against the Coronavirus by Bridging the Centralized - Decentralized Divide for Stronger Privacy. - Wasilij Beskorovajnov; Felix Dörre; Gunnar Hartung; Alexander Koch 001; Jörn Müller-Quade; Thorsten Strufe (IACR Cryptol. ePrint Arch., 2020)

The Landscape of Security from Physical Assumptions1. - Alexander Koch 001 (ITW, 2021)

Black-Box Accumulation Based on Lattices. - Sebastian H. Faller; Pascal Baumer; Michael Klooß; Alexander Koch 001; Astrid Ottenhues; Markus Raiber (IACR Cryptol. ePrint Arch., 2021)

Card-Based Cryptography Meets Formal Verification. - Alexander Koch 001; Michael Schrempp; Michael Kirsten (New Gener. Comput., 2021)

Fortified Multi-Party Computation: Taking Advantage of Simple Secure Hardware Modules. - Brandon Broadnax; Alexander Koch 001; Jeremias Mechler; Tobias Müller 005; Jörn Müller-Quade; Matthias Nagel 001 (Proc. Priv. Enhancing Technol., 2021)

Private Stream Aggregation with Labels in the Standard Model. - Johannes Ernst; Alexander Koch 001 (Proc. Priv. Enhancing Technol., 2021)

Private Function Evaluation with Cards. - Alexander Koch 001; Stefan Walzer (New Gener. Comput., 2022)

Check Alternating Patterns: A Physical Zero-Knowledge Proof for Moon-or-Sun. - Samuel D. Hand; Alexander Koch 001; Pascal Lafourcade 001; Daiki Miyahara; Léo Robert (IACR Cryptol. ePrint Arch., 2023)

Two-Party Decision Tree Training from Updatable Order-Revealing Encryption. - Robin Berger; Felix Dörre; Alexander Koch 001 (IACR Cryptol. ePrint Arch., 2024)

QuietOT: Lightweight Oblivious Transfer with a Public-Key Setup. - Geoffroy Couteau; Lalita Devadas; Srinivas Devadas; Alexander Koch 001; Sacha Servan-Schreiber (IACR Cryptol. ePrint Arch., 2024)

LaPSuS - A Lattice-Based Private Stream Aggregation Scheme under Scrutiny. - Johannes Ottenhues; Alexander Koch 001 (IACR Cryptol. ePrint Arch., 2024)

Efficient Card-Based ZKP for Single Loop Condition and Its Application to Moon-or-Sun. - Samuel D. Hand; Alexander Koch 001; Pascal Lafourcade 001; Daiki Miyahara; Léo Robert (New Gener. Comput., 2024)

The Quantum Decoherence Model: Everlasting Composable Secure Computation and More. - Nico Döttling; Alexander Koch 001; Sven Maier; Jeremias Mechler; Anne Müller; Jörn Müller-Quade; Marcel Tieplet (IACR Cryptol. ePrint Arch., 2025)