Information Security
Research Assistant
Address:
Ruhr-University Bochum
Faculty of Computer Science
Information Security
Universitätsstr. 150
D-44801 Bochum
Room: MC 1.61
Telephone: (+49) (0) 234 32 – 24984
E-Mail: jannik.albrecht@rub.de
I am a fourth-year PhD student in Computer Science at Ruhr University Bochum and was among the first doctoral students to join the Chair for Information Security (InfSec) in 2022. My research focuses on the security of decentralized systems, with an emphasis on security challenges arising at the network layer.
Outside of my research, I like to keep active with sports such as bouldering, acrobatics, and martial arts, or by playing the piano. You can find my publications on Google Scholar, DBLP, and ORCID.
Feel free to contact me by email.
Curriculum Vitae
- Since 04/2022: Research assistant at the Chair for Information Security
- 10/2019 – 11/2021: Master of Science (M.Sc.) in IT Security / Information Technology at Ruhr-University Bochum
- 10/2016 – 09/2019: Bachelor of Science (B.Sc.) in IT Security / Information Technology at Ruhr-University Bochum
Publications
- Jannik Albrecht, Ghassan Karame
On the Effectiveness of Mempool-based Transaction Auditing
In Proceedings of the ACM Web Conference 2026 (WWW ’26)
[ Preprint | BibTeX ] - Jannik Albrecht, Sebastien Andreina, Frederik Armknecht, Ghassan Karame, Giorgia Marson, Julian Willingmann
Larger-scale Nakamoto-style Blockchains Don’t Necessarily Offer Better Security
In Proceedings of the IEEE Symposium on Security and Privacy 2024 (SP ’24)
[ Preprint | BibTeX ]
Talks & Presentations
- Fast Off-Chain Payments with Second-Layer Privacy, 9th International Workshop on Cryptocurrencies and Blockchain Technology – CBT 2025, Toulouse, France, September 2025
- Hands-on session, CASA Summer School 2022 on Blockchain Security, Bochum, Germany, June 2022
Peer Reviewing
- PC member (Security Track) for The 2026 ACM Web Conference
- Subreviewer for The ACM Conference on Computer and Communications Security (CCS) 2025
- Peer reviewer for the IEEE Transactions on Information Forensics & Security (TIFS)
- Peer reviewer for the IEEE Transactions on Dependable and Secure Computing (TDSC)
Teaching
I served as a teaching assistant for the following courses:
- Blockchain and Decentralized Security (5 ECTS) (former Blockchain Security and Privacy), Ruhr University Bochum (G. Karame), Winter Semester 2022/23, 2023/24, 2025/26, 2025/26
- Introduction to Blockchain and Decentralized Security (5 ECTS) (former Introduction to Blockchain Security), Ruhr University Bochum (G. Karame), Winter Semester 2022/23, 2023/24, 2025/26, 2025/26
- System Security (5 ECTS), Ruhr University Bochum (G.Karame), Summer Semester 2022
- Seminar Information Security (2 ECTS), Ruhr University Bochum, Summer Semester 2023, Winter Semester 2022/23, 2023/24
Co-Supervised Theses
- Alexander Rudolf, „Modelling blockchains“, Bachelor’s Thesis, 2022
- Malcom Mohamed, „Analysis of Second-Layer Solutions for Permissioned Blockchains“, Master’s Thesis, 2022
- Sandra Deeb, „Modeling Selfish Mining Strategies using Markov Decision Processes“, Bachelor’s Thesis, 2023
- Eric Naber, „Security Evaluation of the XRP Ledger Consensus Protocol“, Bachelor’s Thesis, 2023
- Arsenii Tcukanov, „Analyzing the Security of Smart Contracts against Front-running Attacks“, Bachelor’s Thesis, 2023/24
- Tobias Pagel, „Increasing accountability in centralized mining pools using TEEs as a trust anchor“, Bachelor’s Thesis, 2023
- Ricoh Handt, „On the privacy provisions of Monero“, Bachelor’s Thesis, 2024/25
- Julian Willingmann, „Simulation-based Security and Robustness Analysis of Gossip Protocols in Blockchains“, Master’s Thesis, 2025
- Tim Niklas Gruel, „On the Security of Decentralized 2nd Layer Solutions“, Master’s Thesis, 2025/26