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Matthias Grundmann, M.Sc.

Scientific staff member
Office Hoursby appointment
Room114 (Geb. 20.50)
Phone+49 721 608-45784
Fax+49 721 608-47763
matthias grundmannSef6∂kit edu

Karlsruhe Institute of Technology (KIT)
Institut of Telematics (TM)
Decentralized Systems and Network
Services Research Group (DSN)

Bldg. 20.50
Engesserstr. 2
76131 Karlsruhe




Personal Information

After graduating from Karlsruhe Institute of Technology with a Master's degree in Computer Science, I work since February 2018 with the research group "Decentralized Systems and Network Services" of Prof. Hartenstein at the Institute of Telematics. Currently I work on methods for topology inference in peer-to-peer networks at the example of Bitcoin as well as payment channel networks as an idea to solve the problem of scaling crypto currencies such as Bitcoin.


since 02/2018 Scientific staff member at Institute of Telematics, Decentralized Systems and Network Services Research GroupKarlsruhe Institute for Technology
10/2014 - 01/2018 Master of Science in Computer Science at Karlsruhe Institute of Technology
11/2013 - 03/2014 Bachelor's thesis at Carnegie Mellon University, USA in the course of InterACT exchange program
10/2010 - 09/2014 Bachelor of Science in Computer Science at Karlsruhe Institute of Technology


Do Payment Channel Networks Need a Blockchain? - Rethinking Blockchain Layers.
Grundmann, M.; Hartenstein, H.
2020, February 10. 24th International Conference "Financial Cryptography and Data Security" (2020), Shangri-La Tanjung, February 10–14, 2020 Full text Full text of the publication as PDF document
TEE-based distributed watchtowers for fraud protection in the Lightning Network.
Leinweber, M.; Grundmann, M.; Schönborn, L.; Hartenstein, H.
2019. Data privacy management, cryptocurrencies and blockchain technology. Ed.: C. Pérez-Solà, 177–194, Springer Nature Switzerland AG, Basel, CH. doi:10.1007/978-3-030-31500-9_11Full text Full text of the publication as PDF document
Banklaves: Concept for a Trustworthy Decentralized Payment Service for Bitcoin.
Grundmann, M.; Leinweber, M.; Hartenstein, H.
2019. Proceedings of 1st IEEE International Conference on Blockchain and Cryptocurrency (ICBC 2019), Seoul, Südkorea, 14 - 17 Mai 2019, 268–276, IEEE, Piscataway (NJ). doi:10.1109/BLOC.2019.8751394Full text Full text of the publication as PDF document
Exploiting Transaction Accumulation and Double Spends for Topology Inference in Bitcoin.
Grundmann, M.; Neudecker, T.; Hartenstein, H.
2019. Financial Cryptography and Data Security : FC 2018 International Workshops, BITCOIN, VOTING, and WTSC, (FC 2018), Nieuwpoort, CU, March 2, 2018. Ed.: A. Zohar, 113–126, Springer, Berlin. doi:10.1007/978-3-662-58820-8_9Full text Full text of the publication as PDF document



  • Access Control Systems: Foundations and Practice (SS'18, SS'19)
  • Decentralized Systems: Fundamentals, Modeling, and Applications (SS'20)


  • Proseminar Bitcoin und Blockchain (WS'19/20, SS'20)
  • Seminar Hot Topics in Decentralized Systems (SS'19)
  • Seminar Internet und Gesellschaft (SS'18, SS'19)
  • Seminar SoK: Science, Security, and the Elusive Goal of Security as a Scientific Pursuit (SS'18)


  • Access Control Systems Lab (SS'18, SS'19, SS'20)
  • Praxis der Softwarenentwicklung: Payment Channel Game (WS'18/19)