Johannes Lohmöller, M.Sc.

Researcher

	Ahornstraße 55, building E3 52074 Aachen Germany
	9018
	+49 241 80-21421
	johannes.lohmoeller@comsys.rwth-aachen.de

Short CV

Since November 2021, I am a researcher at the Chair of Communication and Distributed Systems. Before, I graduated with an M.Sc. in Computer Science at RWTH Aachen University. I am part of the Security and Privacy Group, and my research centers around privacy-preserving methods such as confidential computing and homomorphic encryption, and understanding their implications, especially in the context of medical use cases.

Looking for a Thesis?

Great! I always seek motivated students interested in improving privacy-preserving methods in today’s distributed systems and analyzing their security. Email me two sentences on your motivation and research interests. Also, include a recent transcript of records or another reference, and we might figure out a suitable thesis topic together.

Due to high demand, I might hand out a quick introductory challenge before starting a new thesis.

Teaching Activities

I am/have been involved in the following teaching activities at RWTH Aachen University:

SS 2025
Seminar on Advanced Internet Technology (1 advised topics; M course)

WS 2024/25
Research Focus Class on Medical Data Privacy (1 of 5 advisors; M course)
Seminar on Advanced Internet Technology (2 advised topics; M course)

SS 2024
Seminar on Advanced Internet Technology (2 advised topics; M course)

WS 2023/24
Seminar on Internet Technology (1 advised topics; B course)
Research Focus Class on Medical Data Privacy (1 of 3 advisors; M course)

SS 2023
Seminar on Internet Technology (2 advised topics; B course)

WS 2022/23
Seminar on Internet Technology (2 advised topics; B course)

SS 2022
Seminar on Internet Technology (2 advised topics; B course)
Practical Internet eXperience (PIX) Lab (1 advised project; M course)
Preseminar on Networks & Security (2 advised topics; B course)

WS 2021/22
Lab: Entwicklung eines Transportprotokolls (1 of 3 advisors; B course)
Seminar on Advanced Internet Technology (1 advised topic; M course)
Seminar on Internet Technology (1 advised topic; B course)

Publications

Benedikt von Querfurth, Johannes Lohmöller, Jan Pennekamp, Tore Bleckwehl, Rafael Kramann, Klaus Wehrle, Sikander Hayat. Transformer-Based Integrative Patient Representations from Single-Cell RNA Data. Learning Meaningful Representations of Life Workshop (LMRL ‘25), Apr 28 - Apr 28, 2025, Singapore, Singapore. Event co-located with the 13th International Conference on Learning Representations (ICLR '25). April 2025.

Johannes Lohmöller, Roman Matzutt, Joscha Loos, Eduard Vlad, Jan Pennekamp, Klaus Wehrle. Complementing Organizational Security in Data Ecosystems with Technical Guarantees. Proceedings of the 1st Conference on Building a Secure and Empowered Cyberspace (BuildSEC ‘24), Dec 19 - Dec 20, 2024, New Delhi, India. December 2024.

Sascha Welten, Karl Kindermann, Ahmet Polat, Martin Görz, Maximilian Jugl, Laurenz Neumann, Alexander Neumann, Johannes Lohmöller, Jan Pennekamp, Stefan Decker. PASTA-4-PHT: A Pipeline for Automated Security and Technical Audits for the Personal Health Train. arXiv. December 2024.

Johannes Lohmöller, Jannis Scheiber, Rafael Kramann, Klaus Wehrle, Sikander Hayat, Jan Pennekamp. scE(match): Privacy-Preserving Cluster Matching of Single-Cell Data. Proceedings of the 23rd IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom ‘24), Dec 17 - Dec 21, 2024, Sanya, China. December 2024.

Benedikt von Querfurth, Johannes Lohmöller, Jan Pennekamp, Tore Bleckwehl, Rafael Kramann, Klaus Wehrle, Sikander Hayat. mcBERT: Patient-Level Single-cell Transcriptomics Data Representation. bioRxiv. November 2024.

Johannes Lohmöller, Jan Pennekamp, Klaus Wehrle. Toward Technically Enforceable Consent in Healthcare Research. Research Papers of the Platform Privacy, vol. 4, Oct 17 - Oct 18, 2024, Berlin, Germany. October 2024.

Johannes Lohmöller, Jan Pennekamp, Roman Matzutt, Carolin Victoria Schneider, Eduard Vlad, Christian Trautwein, Klaus Wehrle. The Unresolved Need for Dependable Guarantees on Security, Sovereignty, and Trust in Data Ecosystems. Data & Knowledge Engineering, vol. 151. May 2024.

Markus Dahlmanns, Felix Heidenreich, Johannes Lohmöller, Jan Pennekamp, Klaus Wehrle, Martin Henze. Unconsidered Installations: Discovering IoT Deployments in the IPv6 Internet. Proceedings of the 2024 IEEE/IFIP Network Operations and Management Symposium (NOMS ‘24), May 6 - May 10, 2024, Seoul, Korea. May 2024.

Johannes Lohmöller, Eduard Vlad, Markus Dahlmanns, Klaus Wehrle. Poster: Bridging Trust Gaps: Data Usage Transparency in Federated Data Ecosystems. Proceedings of the 2023 ACM SIGSAC Conference on Computer and Communications Security (CCS ’23), Nov 26 - Nov 30, 2023, Copenhagen, Denmark. November 2023.

Jan Pennekamp, Johannes Lohmöller, Eduard Vlad, Joscha Loos, Niklas Rodemann, Patrick Sapel, Ina Berenice Fink, Seth Schmitz, Christian Hopmann, Matthias Jarke, Günther Schuh, Klaus Wehrle, Martin Henze. Designing Secure and Privacy-Preserving Information Systems for Industry Benchmarking. Proceedings of the 35th International Conference on Advanced Information Systems Engineering (CAiSE ‘23), vol. 13901, Jun 12 - Jun 16, 2023, Zaragoza, Spain. June 2023.

Zhuojun Wu, Johannes Lohmöller, Christiane Kuhl, Klaus Wehrle, Joachim Jankowski. Use of Computation Ecosystems to Analyze the Kidney-Heart Crosstalk. Circulation research, vol. 132, no. 8. April 2023.

Johannes Lohmöller, Jan Pennekamp, Roman Matzutt, Klaus Wehrle. On the Need for Strong Sovereignty in Data Ecosystems. Proceedings of the 1st International Workshop on Data Ecosystems (DEco ‘22), vol. 3306, Sep 5 - Sep 5, 2022, Sydney, NSW, Australia. Event co-located with the 8th International Conference on Very Large Databases (VLDB '22). September 2022.

Markus Dahlmanns, Johannes Lohmöller, Jan Pennekamp, Jörn Bodenhausen, Klaus Wehrle, Martin Henze. Missed Opportunities: Measuring the Untapped TLS Support in the Industrial Internet of Things. Proceedings of the 2022 ACM Asia Conference on Computer and Communications Security (ASIACCS ‘22), May 30 - Jun 3, 2022, Nagasaki, Japan. May 2022.

Asya Mitseva, Jan Pennekamp, Johannes Lohmöller, Torsten Ziemann, Carl Hoerchner, Klaus Wehrle, Andriy Panchenko. POSTER: How Dangerous is My Click? Boosting Website Fingerprinting By Considering Sequences of Webpages. Proceedings of the 28th ACM SIGSAC Conference on Computer and Communications Security (CCS ‘21), Nov 15 - Nov 19, 2021, Seoul, Korea. November 2021.

Markus Dahlmanns, Johannes Lohmöller, Ina Berenice Fink, Jan Pennekamp, Klaus Wehrle, Martin Henze. Easing the Conscience with OPC UA: An Internet-Wide Study on Insecure Deployments. Proceedings of the Internet Measurement Conference (IMC ‘20), Oct 27 - Oct 29, 2020, Pittsburgh, PA, USA. October 2020.

Advised Theses

Please note that ongoing theses are only visible from within the RWTH network. If you are not affiliated with RWTH Aachen University and you are interested in our topics, please contact us.

A Topic in Privacy-Enhancing Technologies

Bachelor's Thesis, RWTH Aachen University, April 2025

Advisors: Johannes Lohmöller, Jan Pennekamp, Hajeong Jeon

Examiners: Klaus Wehrle, Sandra Geisler (DSMA)

A Topic in Usage Control

Bachelor's Thesis, RWTH Aachen University, April 2025

Advisors: Jan Pennekamp, Johannes Lohmöller, Hajeong Jeon

Examiners: Klaus Wehrle, Sandra Geisler (DSMA)

A Topic in Security & Privacy

Bachelor's Thesis, RWTH Aachen University, April 2025

Advisor: Johannes Lohmöller

Examiners: Klaus Wehrle, Ulrike Meyer (IT-Sec)