Ruhr-University Bochum
Faculty of Computer Science
Computational Neuroscience
Universitätsstr. 150
44801 Bochum
Room: NB 3.33
Tel: +49 (0)234 32-29486
E-Mail: sen.cheng@rub.de
Office hours: By Arrangement
Table of Contents
Courses
Research
My research group investigates the neural mechanisms underlying learning and memory. We are primarily interested in the hippocampus, the brain region that is mainly involved in episodic memory, as well as in the learning and memory of sequences. Our research focuses on the dynamics of these processes, which has received relatively little attention to date.
We employ two complementary approaches. Our first approach is modeling, including mathematic models as well as computer simulation of complex networks. While all models are simplified, we aim to build biologically realistic models that capture the essence of the neural circuit mechanism underlying learning and memory. Our second approach is data-mining. We develop methods for model-based data analysis and apply such methods to experimental data. These data include electrophysiological and EEG recordings as well as behavioral data. We collaborate closely with neuroscientists on the RUB campus and at other universities in Germany.
Publications
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2008
2007
2006
2004
2003
2002
2001
Publications
Alexander May, Gabriel Sá Diogo
Multi-Instance Security Degradation of Code-Based KEMs Proceedings Article
In: Security and Cryptography for Networks (SCN 26), 2026.
Links | Schlagwörter: Crypto Others
@inproceedings{nokey,
title = {Multi-Instance Security Degradation of Code-Based KEMs},
author = {Alexander May and Gabriel Sá Diogo},
url = {https://eprint.iacr.org/2026/517.pdf, Paper},
year = {2026},
date = {2026-09-01},
urldate = {2026-09-01},
booktitle = {Security and Cryptography for Networks (SCN 26)},
journal = {Preprint},
keywords = {Crypto Others},
pubstate = {published},
tppubtype = {inproceedings}
}
Marcus Brinkmann, Nicolai Kraus, Alexander May
Halfspace Learning for Lattice Signature Key Recovery from Signs Proceedings Article
In: Advances in Cryptology (CRYPTO 26), 2026.
Schlagwörter: Crypto Flagship, Rank A*/A
@inproceedings{nokey,
title = {Halfspace Learning for Lattice Signature Key Recovery from Signs},
author = {Marcus Brinkmann and Nicolai Kraus and Alexander May },
year = {2026},
date = {2026-08-01},
urldate = {2026-08-01},
booktitle = {Advances in Cryptology (CRYPTO 26)},
series = {Lecture Notes in Computer Science},
keywords = {Crypto Flagship, Rank A*/A},
pubstate = {published},
tppubtype = {inproceedings}
}
Alexander May, Massimo Ostuzzi, Henrik Ressler
Just Guess: Improved (Quantum) Algorithm for the Underdetermined MQ Problem Proceedings Article
In: Advances in Cryptology (EUROCRYPT 26), 2026.
Links | Schlagwörter: Crypto Flagship, Quantum, Rank A*/A
@inproceedings{nokey,
title = {Just Guess: Improved (Quantum) Algorithm for the Underdetermined MQ Problem},
author = {Alexander May and Massimo Ostuzzi and Henrik Ressler},
url = {https://eprint.iacr.org/2025/1788.pdf, Paper},
year = {2026},
date = {2026-05-01},
urldate = {2026-05-01},
booktitle = {Advances in Cryptology (EUROCRYPT 26)},
series = {Lecture Notes in Computer Science},
keywords = {Crypto Flagship, Quantum, Rank A*/A},
pubstate = {published},
tppubtype = {inproceedings}
}
Kaveh Bashiri, Timo Glaser, Alexander May, Julian Nowakowski
Super-Quadratic Quantum Speed-Ups and Guessing Many Likely Keys Proceedings Article
In: Advances in Cryptology (EUROCRYPT 26), 2026.
Links | Schlagwörter: Crypto Flagship, Quantum, Rank A*/A
@inproceedings{nokey,
title = {Super-Quadratic Quantum Speed-Ups and Guessing Many Likely Keys},
author = {Kaveh Bashiri and Timo Glaser and Alexander May and Julian Nowakowski},
url = {https://eprint.iacr.org/2023/797.pdf, Paper},
year = {2026},
date = {2026-05-01},
urldate = {2026-05-01},
booktitle = {Advances in Cryptology (EUROCRYPT 26)},
journal = {Preprint},
series = {Lecture Notes in Computer Science},
keywords = {Crypto Flagship, Quantum, Rank A*/A},
pubstate = {published},
tppubtype = {inproceedings}
}
Alexander Karenin and Elena Kirshanova and Julian Nowakowski, Alexander May
Fast Slicer for Batch-CVP: Making Lattice Hybrid Attacks Practical Proceedings Article
In: Advances in Cryptology (ASIACRYPT 25), 2025.
Links | Schlagwörter: Crypto Flagship, Rank A*/A
@inproceedings{nokey,
title = {Fast Slicer for Batch-CVP: Making Lattice Hybrid Attacks Practical},
author = {Alexander Karenin and
Elena Kirshanova and
Julian Nowakowski and
Alexander May
},
url = {https://eprint.iacr.org/2025/1910.pdf, Paper},
year = {2025},
date = {2025-12-02},
urldate = {2025-12-02},
booktitle = {Advances in Cryptology (ASIACRYPT 25)},
journal = {Advances in Cryptology (ASIACRYPT 25)},
keywords = {Crypto Flagship, Rank A*/A},
pubstate = {published},
tppubtype = {inproceedings}
}
Simon Damm, Asja Fischer, Alexander May, Soundes Marzougui, Leander Schwarz, Henning Seidler, Jean-Pierre Seifert, Jonas Thietke, Vincent Quentin Ulitzsch
Solving Concealed ILWE and its Application for Breaking Masked Dilithium Proceedings Article
In: Advances in Cryptology (ASIACRYPT 25), 2025.
Links | Schlagwörter: Crypto Flagship, Rank A*/A
@inproceedings{nokey,
title = {Solving Concealed ILWE and its Application for Breaking Masked Dilithium},
author = {Simon Damm and Asja Fischer and Alexander May and Soundes Marzougui and Leander Schwarz and Henning Seidler and Jean-Pierre Seifert and Jonas Thietke and Vincent Quentin Ulitzsch},
url = {https://eprint.iacr.org/2025/1629.pdf, Paper},
year = {2025},
date = {2025-12-01},
urldate = {2025-12-01},
booktitle = {Advances in Cryptology (ASIACRYPT 25)},
keywords = {Crypto Flagship, Rank A*/A},
pubstate = {published},
tppubtype = {inproceedings}
}
Alexander May, Massimo Ostuzzi
Multiple Group Action Dlogs with(out) Precomputation Proceedings Article
In: Public Key Cryptography (PKC '25), 2025.
Links | Schlagwörter: Crypto Area
@inproceedings{DBLP:journals/iacr/MayO24,
title = {Multiple Group Action Dlogs with(out) Precomputation},
author = {Alexander May and Massimo Ostuzzi},
url = {https://eprint.iacr.org/2024/564, Paper
https://iacr.org/submit/files/slides/2025/pkc/pkc2025/5/5_slides.pdf, Slides
https://doi.org/10.1007/978-3-031-91826-1_12, DOI},
year = {2025},
date = {2025-05-01},
urldate = {2025-05-01},
booktitle = {Public Key Cryptography (PKC '25)},
journal = {Public Key Cryptography (PKC '25)},
keywords = {Crypto Area},
pubstate = {published},
tppubtype = {inproceedings}
}
Simon Damm, Nicolai Kraus, Alexander May, Julian Nowakowski, Jonas Thietke
One Bit to Rule Them All - Imperfect Randomness Harms Lattice Signatures Proceedings Article
In: Public Key Cryptography (PKC '25), 2025.
Links | Schlagwörter: Crypto Area
@inproceedings{nokey,
title = {One Bit to Rule Them All - Imperfect Randomness Harms Lattice Signatures},
author = {Simon Damm and Nicolai Kraus and Alexander May and Julian Nowakowski and Jonas Thietke},
url = {https://eprint.iacr.org/2025/820.pdf, Paper
https://iacr.org/submit/files/slides/2025/pkc/pkc2025/144/144_slides.pdf, Slides
https://link.springer.com/chapter/10.1007/978-3-031-91820-9_10, DOI},
year = {2025},
date = {2025-05-01},
urldate = {2025-05-01},
booktitle = {Public Key Cryptography (PKC '25)},
keywords = {Crypto Area},
pubstate = {published},
tppubtype = {inproceedings}
}
Marcus Brinkmann, Chitchanok Chuengsatiansup, Alexander May, Julian Nowakowski, Yuval Yarom
Leaky McEliece: Secret Key Recovery From Highly Erroneous Side-Channel Information Artikel
In: Transactions on Cryptographic Hardware and Embedded Systems (TCHES), 2025.
Links | Schlagwörter: Crypto Area, Rank A*/A
@article{DBLP:journals/tches/BrinkmannCMNY25b,
title = {Leaky McEliece: Secret Key Recovery From Highly Erroneous Side-Channel Information},
author = {Marcus Brinkmann and Chitchanok Chuengsatiansup and Alexander May and Julian Nowakowski and Yuval Yarom},
url = {https://eprint.iacr.org/2023/1536.pdf, Paper},
year = {2025},
date = {2025-02-11},
urldate = {2025-02-11},
journal = {Transactions on Cryptographic Hardware and Embedded Systems (TCHES)},
keywords = {Crypto Area, Rank A*/A},
pubstate = {published},
tppubtype = {article}
}
Simon Damm, Asja Fischer, Alexander May, Soundes Marzougui, Leander Schwarz, Henning Seidler, Jean-Pierre Seifert, Jonas Thietke, Vincent Quentin Ulitzsch
Solving Concealed ILWE and Its Application for Breaking Masked Dilithium Proceedings Article
In: International Conference on the Theory and Application of Cryptology and Information Security (ASIACRYPT), 2025.
Links | Schlagwörter:
@inproceedings{Damm2025SolvingConcealed,
title = {Solving Concealed ILWE and Its Application for Breaking Masked Dilithium},
author = {Simon Damm and Asja Fischer and Alexander May and Soundes Marzougui and Leander Schwarz and Henning Seidler and Jean-Pierre Seifert and Jonas Thietke and Vincent Quentin Ulitzsch},
url = {https://doi.org/10.1007/978-981-95-5096-8_19},
year = {2025},
date = {2025-01-01},
booktitle = {International Conference on the Theory and Application of Cryptology and Information Security (ASIACRYPT)},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Lectures (Moodle/Notes)
- Cryptanalysis (Codes, Classic 1, Cl. 2)
- Cryptography (Sym, Asym)
- Probabilistic (Basic, Algos)
- Quantum Algorithms (Script)
Former PhDs
Show names, year of graduation
- Önder Askin, 2024
- Floyd Zweydinger, 2023
- Lars Schlieper, 2022
- Alexander Helm, 2020
- Andre Esser, 2020
- Matthias Minihold, 2019
- Leif Both, 2018
- Robert Kübler, 2018
- Elena Kirshanova, 2016
- Ilya Ozerov, 2016
- Gottfried Herold, 2014
- Alexander Meurer, 2014
- Mathias Herrmann, 2011
- Maike Ritzenhofen, 2010
Calvin & Hobbes
Prof. Dr. Sen Cheng
Computational Neuroscience
Professor / Head of Chair
Address:
Ruhr-University Bochum
Faculty of Computer Science
Computational Neuroscience
Universitätsstr. 150
--D-44801 Bochum
Room: NB 3/33
Telephone: +49 (0)234 32-29486
Office Hours: By arrangement
E-Mail: sen.cheng@rub.de
Courses
- 310506 : Introduction to Computational Neuroscience
- 212006 : Künstliche Neuronale Netze
- 211046 : Introduction to Computational Neuroscience
- 212103 : Journal Club: Learning and Memory
- 212102 : Research Colloquium: Interdisciplinary Perspectives on Episodic Memory
Research
My research group investigates the neural mechanisms underlying learning and memory. We are primarily interested in the hippocampus, the brain region that is mainly involved in episodic memory, as well as in the learning and memory of sequences. Our research focuses on the dynamics of these processes, which has received relatively little attention to date.We employ two complementary approaches. Our first approach is modeling, including mathematic models as well as computer simulation of complex networks. While all models are simplified, we aim to build biologically realistic models that capture the essence of the neural circuit mechanism underlying learning and memory. Our second approach is data-mining. We develop methods for model-based data analysis and apply such methods to experimental data. These data include electrophysiological and EEG recordings as well as behavioral data. We collaborate closely with neuroscientists on the RUB campus and at other universities in Germany.