I’m an Associate Professor in the Cybersecurity Section at DTU Compute in Copenhagen, Denmark. My research focus is on (applied) secure computation as well as (lattice-based) zero knowledge protocols. Furthermore, I am interested into security for machine learning and secure protocol design using public ledgers.
Before starting on this position I have been an Assistant Professor and Postdoc at Aarhus University as well as a Postdoc at Bar Ilan University, Israel. I obtained my PhD in 2016 from Aarhus University.
Preprints
- Cheater Identification on a Budget: MPC with Identifiable Abort from Pairwise MACs, with Nikolas Melissaris, Rahul Rachuri and Peter Scholl
- CaSCaDE: (Time-Based) Cryptography from Space Communications DElay, with Bernardo David, Elena Pagnin and Akira Takahashi
- Simple Amortized Proofs of Shortness for Linear Relations over Polynomial Rings, with Vadim Lyubashevsky
Peer-reviewed Publications
2023
- SoK: Vector OLE-based Zero-Knowledge Protocols, with Samuel Dittmer, Peter Scholl and Xiao Wang. DCC 2023
- SoK: Privacy-Enhancing Technologies in Finance, with James Hsin-Yu Chiang, Bernardo David and Tore Frederiksen. AFT 2023
- Publicly Verifiable Zero-Knowledge and Post-Quantum Signatures From VOLE-in-the-Head, with Lennart Braun, Cyprien Delpech de Saint Guilhem, Michael Klooss, Emmanuela Orsini, Lawrence Roy and Peter Scholl. CRYPTO 2023
- Verifiable Mix-Nets and Distributed Decryption for Voting from Lattice-Based Assumptions, with Diego F. Aranha, Kristian Gjøsteen and Tjerand Silde. CCS 2023
- CRAFT: Composable Randomness and Almost Fairness from Time, with Bernardo David, Rafael Dowsley, Ravi Kishore, Sabine Oechsner and Jesper Buus Nielsen. PKC 2023
- EAGLE: Efficient Privacy Preserving Smart Contracts, with James Hsin-yu Chiang, Bernardo David and Tore Kasper Frederiksen. Financial Crypto 2023
2022
- A Framework for Universally Composable Publicly Verifiable Cryptographic Protocols, with Bernardo David and Rafael Dowsley. ProvSec 2022
- MoZZarella: Efficient Vector-OLE and Zero-Knowledge proofs over Z2k, with Lennart Braun, Alexander Munch-Hansen and Peter Scholl. CRYPTO 2022
- FETA: Efficient Threshold Designated-Verifier Zero-Knowledge proofs, with Robin Jadoul and Emmanuela Orsini and Peter Scholl and Nigel P. Smart. ACM CCS 2022
- SoK: Mitigation of Front-running in Decentralized Finance, with James Hsin-yu Chiang, Bernardo David, Tore Kasper Frederiksen and Lorenzo Gentile. Financial Crypto DeFi Workshop 2022
2021
- Appenzeller to Brie: Efficient Zero-Knowledge Proofs for Mixed-Mode Arithmetic and Z2k, with Lennart Braun, Alexander Munch-Hansen and Peter Scholl. ACM CCS 2021
- Mac’n’Cheese: Zero-Knowledge Proofs for Arithmetic Circuits with Nested Disjunctions, with Alex J. Malozemoff, Marc Rosen and Peter Scholl. CRYPTO 2021
- Fairness in the Eyes of the Data: Certifying Machine-Learning Models, with Shahar Segal, Yossi Adi, Benny Pinkas, Chaya Ganesh and Joseph Keshet. AAAI/ACM 2021 Conference on Artificial Intelligence, Ethics and Society. There also exists a poster which you can see here
- P2DEX: Privacy-Preserving Decentralized Currency Exchange, with Bernardo David and Tore Frederiksen. ACNS 2021
- Lattice-Based Proof of Shuffle and Applications to Electronic Voting, with Diego Aranha, Kristian Gjøsteen, Tjerand Silde and Thor Tunge. CT-RSA 2021
- Banquet: Short and Fast Signatures from AES, with Cyprien Delpech de Saint Guilhem and Daniel Kales and Emmanuela Orsini and Peter Scholl and Greg Zaverucha. PKC 2021
- A Foundation of Time-Lock Puzzles in UC, with Bernardo David, Rafael Dowsley, Sabine Oechsner and Jesper Buus Nielsen. Eurocrypt 2021
2020
- Efficient Protocols for Oblivious Linear Function Evaluation from Ring-LWE, with Daniel Escudero, Alberto Pedrouzo-Ulloa, Peter Scholl and Juan Ramón Troncoso-Pastoriza, SCN 2020. An extended version of the paper has also been published in the Journal of Computer Security.
- Efficient Constant-Round MPC with Identifiable Abort and Public Verifiability, with Emmanuela Orsini, Peter Scholl and Eduardo Soria-Vazquez, CRYPTO 2020
- PESTO: Proactively Secure Distributed Single Sign-On, or How to Trust a Hacked Server, with Tore K. Frederiksen, Julia Hesse, Anja Lehmann and Avishay Yanai, EuroS&P 2020
- Concretely-Efficient Zero-Knowledge Arguments for Arithmetic Circuits and Their Application to Lattice-Based Cryptography, with Ariel Nof, PKC 2020
- Insured MPC: Efficient Secure Multiparty Computation with Punishable Abort, with Bernardo David and Rafael Dowsley, Financial Crypto 2020
2019
- Using TopGear in Overdrive: A more efficient ZKPoK for SPDZ, with Daniele Cozzo and Nigel P. Smart, SAC 2019
2018
- Towards Practical Lattice-Based One-Time Linkable Ring Signatures, with Huang Lin and Sabine Oechsner, ICICS 2018
- More Efficient Commitments from Structured Lattice Assumptions, with Ivan Damgård and Vadim Lyubashevsky and Sabine Oechsner and Chris Peikert, SCN 2018
- Turning Your Weakness Into a Strength: Watermarking Deep Neural Networks by Backdooring, with Yossi Adi and Moustapha Cisse and Joseph Keshet and Benny Pinkas, USENIX 2018.
- Sub-Linear Lattice-Based Zero-Knowledge Arguments for Arithmetic Circuits, with Jonathan Bootle and Andrea Cerulli and Rafael del Pino and Jens Groth and Vadim Lyubashevsky, CRYPTO 2018
2016
- How to prove knowledge of small secrets, with Ivan Damgård and Kasper Green Larsen and Michael Nielsen, CRYPTO 2016
- Efficient Secure Multiparty Computation with Identifiable Abort, with Emmanuela Orsini and Peter Scholl, TCC-B 2016. A poster of this work can be found here
- On Garbling Schemes with and without Privacy, SCN 2016
- Better Preprocessing for Secure Multiparty Computation, with Ivan Damgård and Tomas Toft and Rasmus Lauritzen, ACNS 2016
2014
- Publicly Auditable Secure Multiparty Computation, with Ivan Damgård and Claudio Orlandi, SCN 2014
Peer-reviewed work outside of Cryptography
- Studying the global spatial randomness of impact craters on Mercury, Venus, and the Moon with geodesic neighborhood relationships (together with my childhood friend Christian Riedel and others)
Teaching
In Spring 2023 I was teaching in the Cryptography and Network Security courses at DTU.
In the Fall 2022 and 2023 I was teaching two full days about Privacy-Enhancing Technologies in the DTU Masters program for Cyber security, alongside my colleague Luisa Siniscalchi.
In the Spring 2021 term I was teaching Optimization and Complexity together with Kristoffer Arnsfelt Hansen.
In the Fall 2020 term I have been teaching some parts of the Cryptographic Computing course at AU alongside Claudio Orlandi and Peter Scholl. I have also been teaching this course in the Fall 2021.
Students
Recently, my first PhD student Alexander Munch-Hansen graduated (co-supervised with Peter Scholl, Aarhus University). I’m now looking for new PhD students and a Postdoc!
Other Work
I’m a coauthor of the FAEST digital signature scheme which has been submitted to the ongoing NIST Post Quantum competition.
I organized a Summer School on Privacy-Preserving Machine Learning together with Bernardo David from ITU Copenhagen in 2022. Click here for more information.
I’ve been a Program Committee member of ACNS 2017, CCS 2019 Workshop on Privacy-Preserving Machine Learning, CCS 2019 Workshop on Encrypted Computing & Applied Homomorphic Cryptography ,The AAAI-20 Workshop on Privacy-Preserving Artificial Intelligence 2020 and 2021, IEEE ICME, LatinCrypt 2021, CCS 2021, ACISP 2021, PKC 2022, ACNS 2022, CRYPTO 2022, AsiaCrypt 2022.
I gave a presentation about Secure Computation in Tel Aviv in 2018. Here is a link to the video.
Projects
My work is currently funded by the DARPA SIEVE program (project FROMAGER) and a Villum Young Investigator starting grant (Project QUID-PRO).
Previously, I received funding from Open Philanthropy (project SecureDNA).
Contact
E-Mail: cabau at dtu dot dk
Twitter: @crypto_carsten
LinkedIn: carsten-baum
Office: Building 322, room 210 (DTU Lyngby Campus)