B²TNS

Blockchain-Based Trustworthy Networked Services

Motivation

Blockchains are one of the most interesting and relevant technologies that were created in recent years. Their initial purpose has been serving as a non-erasable and tamper-proof ledger for decentralized payment systems. Besides this application area, Blockchain technology can be used in other types of networked systems as a trusted building block comparable to a secure element in computer hardware.

The purpose of this interest group is to foster research and collaboration with industry, other research organizations and also with students at TUM. Our mission is to investigate how Blockchain technology can help us to build trustworthy and secure networked services. This includes research on federated identity management across different institutions, and secure and accountable configuration of networked devices.

Our chair has teaches Blockchain related topics in a variety of courses. Below you can find a short summary of the most interesting courses.

Besides, we are offering various theses and research projects. For that, navigate to websites of individual researchers.

Lab Course iLab 2

The iLab: You set the Focus! (iLab2) is a practical lab course offered by our chair for bachelor and master students. Aside from selected network topics like ipv6, bgp or smart space orchestration students also design their own lab content for future generations. As part of this process a Blockchain lab was created. It teaches students the basic principles of Blockchains and cryptocurrencies. In the practical hands on part they can play around with an actual Blockchain implementation (multichain). They discover how proof of work and mining works and what happens when two Blockchains segments of multiple size merge.

Seminars Future Internet (FI) and Innovative Internet Technologies and Mobile Communication (IITM)

We are continuously offering seminar topics on Blockchains and Distributed Ledger Technologies in our seminars "Innovative Internettechnologien und Mobilkommunikation" (IITM) and "Future Internet" (FI).

Peer-to-Peer Systems and Security

Peer-to-Peer (P2P) systems provide an alternative architecture for networking applications. A core assumption of P2P systems is that services are provided in a highly or completely distributed manner. This contrasts with traditional client-server architectures where servers are centralized and are thus deemed privileged or essential components. Extensive decentralization in P2P systems results in new advantages and disadvantages. Without centralized components, fault tolerance of systems can be increased and former performance bottlenecks can be avoided. When designed carefully, P2P systems provide better scaling properties by e.g. distributing workload in the network. Moreover, due to the absence of centralized components, P2P systems are good candidates for providing extensive privacy properties to its users. Naturally, as we thread away from centralization in P2P systems, issues arise which could be efficiently solved by having centralized control. A prominent issue is that of attackers, who appear as benevolent peers but have malicious intent. This course serves to provide you the knowledge about existing P2P protocols and methods on how to enhance efficiency without sacrificing scalability and security.

Network Security

This lecture is an introduction to the field of network security and its fundamental topics. We define security goals and threats and introduce firewalls and cryptographic operations. This knowledge is used further as a starting point for the design of secure networks. We present modern security protocols used in network protocols and architectures as well as vulnerabilities in existing systems. Lastly, the lecture provides an introduction to privacy in computer networks.

News

  • 02.07.2024 - Richard von Seck presented our work titled "On the Impact of Network Transport Protocols on Leader-Based Consensus Communication" at BSCI 2024, awarded as a Best Student Paper Award.
  • 20.05.2024 - We organized the second TUM Blockchain Salon on the 16 and 17 May at the Institute of Advanced Studies (IAS). For more details, navigate to: Blockchain Salon.
  • 13.05.2023 - We organized the first TUM Blockchain Salon on the 11 and 12 May at the Institute of Advanced Studies (IAS). For more details, navigate to: Blockchain Salon.
  • 17.03.2023 - Filip Rezabek presented our work titled "TSN Experiments Using COTS Hardware and Open-Source Solutions: Lessons Learned" at PerFail workshop collacated with PerCom 2023, awarded as a Best Paper Award.
  • 17.12.2022 - Richard von Seck presented our work titled "BFT-Blocks: The Case for Analyzing Networking in Byzantine Fault Tolerant Consensus" at NCA 2022.
  • 31.10.2022 - Filip Rezabek presented our work titled "PTP Security Measures and their Impact on Synchronization Accuracy" at CNSM 2022.
  • 01.08.2022 - Marks a start of the ACE-SUPPRA in collaboration with Algorand Foundation. For more details, navigate to: ACE-SUPPRA.
  • 01.04.2022 - VITAF project succesfully completed.
  • 24.04.2020 - Holger Kinkelin presented our work titled "Hardening X.509 Certificate Issuance using Distributed Ledger Technology" at NOMS 2018, IEEE/IFIP DISSECT Workshop
  • 28.02.2020 - Filip Rezabek defended his thesis titled "A Fault-Proof and Tamper-Resistant Certificate Issuance Process". Congratulations!
  • 01.01.2019 - Marks a start of the BMBF VITAF project. For more details, navigate to: VITAF.
  • 04.06.2018 - Valentin Hauner defended his highly successful thesis on "Trustworthy Configuration Management". Congratulations!
  • 15.05.2018 - We are happy to announce our upcoming research project VITAF ("Vertrauenswürdige IT für autonomoes Fahren").
  • 23.04.2018 - Holger Kinkelin presented our work in progress paper on "Trustworthy Configuration Management" at NOMS 2018, IEEE/IFIP DOMINOS Workshop
  • 12.12.2017 - Our students Valentin Hauner and Hendrik Leppelsack explain how Hyperledger Fabric works and give a hands on session

Contact

If this sounds interesting to you, feel free to contact us:

Related publications

2024-09-01 Filip Rezabek, Max Helm, Nicolas Buchner, Monika Smolarska, Benedikt Jaeger, Georg Carle, “Assessment of OPC UA PubSub at Scale using TSN Infrastructure and Network Calculus,” in 21st IEEE International Conference on Mobile Ad-Hoc and Smart Systems (MASS 2024), Sep. 2024. [Pdf] [Bib]
2024-07-01 Richard von Seck, Filip Rezabek, Sebastian Gallenmüller, Georg Carle, “On the Impact of Network Transport Protocols on Leader-Based Consensus Communication,” in Proceedings of the 6th ACM International Symposium on Blockchain and Secure Critical Infrastructure, Jul. 2024. Best Student Paper Award [Preprint] [Bib]
2024-03-01 Filip Rezabek*, Marcin Bosk*, Leander Seidlitz, Jörg Ott, Georg Carle, “Context Matters: Lessons Learned from Emulated and Simulated TSN Environments,” in 3rd International Workshop on Negative Results in Pervasive Computing (PerFail 2024), Biarritz, France, Mar. 2024. [Pdf] [Bib]
2024-01-01 Burak Öz, Jonas Gebele, Parshant Singh, Filip Rezabek, Florian Matthes, “Playing the MEV Game on a First-Come-First-Served Blockchain,” Jan. 2024. [Preprint] [Bib]
2023-11-01 Filip Rezabek, Kilian Glas, Richard Von Seck, Achraf Aroua, Tizian Leonhardt, Georg Carle, “Multilayer Environment and Toolchain for Holistic NetwOrk Design and Analysis,” Nov. 2023. [Preprint] [Bib]
2023-11-01 Burak Öz, Filip Rezabek, Jonas Gebele, Felix Hoops, Florian Matthes, “A Study of MEV Extraction Techniques on a First-Come-First-Served Blockchain,” Nov. 2023. [Preprint] [Bib]
2023-06-01 Marcin Bosk*, Filip Rezabek*, Johannes Abel, Kilian Holzinger, Max Helm, Georg Carle, Jörg Ott, “Simulation and Practice: A Hybrid Experimentation Platform for TSN,” in 22nd International Federation for Information Processing (IFIP) Networking Conference, Barcelona, Spain, Jun. 2023. [Bib]
2022-11-01 Filip Rezabek, Max Helm, Tizian Leonhardt, Georg Carle, “PTP Security Measures and their Impact on Synchronization Accuracy,” in 18th International Conference on Network and Service Management (CNSM 2022), Thessaloniki, Greece, Nov. 2022. [Pdf] [Bib]

Finished student theses

Author Title Type Advisors Year Links
Ilteber Ayvaci Data Collection Pipeline for Blockchain Platforms MA Filip Rezabek, Kilian Glas 2024
Veronika Bauer Evaluation of SNARK Generation Tools in Private Infrastructure IDP Kilian Glas, Filip Rezabek 2024
Simon Borowski Macro View on Smart Contracts and their Processing Overhead IDP Filip Rezabek, Kilian Glas, Richard von Seck 2023
Ali Sabbagh Assessment of Maximal Extractable Value (MEV) Mitigation Techniques MA Filip Rezabek, Burak Öz 2023
Daniel Gockel Evaluation of State Channel Approaches on Smart Contract Platforms BA Kilian Glas, Filip Rezabek 2023
Marc Sinner Design and Evaluation of a Decentralized Blockchain Ticketing System MA Filip Rezabek 2023
Phillip Kemper Assessment of ZK-EVM-based Rollups for Blockchain Scalability MA Kilian Glas, Filip Rezabek 2023
Achraf Aroua Assessment of Ethereum after the Merge MA Filip Rezabek 2023
Tizian Leonhardt Private Computing on Permissionless Blockchains IDP Filip Rezabek 2023
Gopi Mehta Exploring Reputation Systems for Permissionless Blockchains MA Filip Rezabek 2023
Leonardo Fraquelli Assessment of Scalable Blockchain Solutions MA Filip Rezabek 2023
Reshma Vasudevan Threshold Cryptography Optimization using Time-Sensitive Networking MA Filip Rezabek 2023
Nina Schwanke Modeling Network Characteristics of Blockchain Protocols MA Filip Rezabek, Richard von Seck, Kilian Glas 2023
Nadeeshani William Eventually Consistent and Resilient CBDC System MA Kilian Glas, Filip Rezabek, Richard von Seck, Peter Zeller 2023
Mostafa Abdelrahman Threshold Signatures for Digital Currency Payment Protocols MA Filip Rezabek, Kilian Glas, Franziska Kreitmair, Lars Hupel 2023
Eric Brendel Scalable Off-Chain Computing on Data Streams using Trusted Execution Environments BA Filip Rezabek, Dr. Xinxin Fan 2023
Eber Christer Scalable Cloud-based Computing relying on Trusted Execution Environments BA Filip Rezabek, Kilian Glas, Dr. Xinxin Fan 2023
Dominik Pham Towards Trustless CA BA, MA Kilian Glas, Holger Kinkelin, Filip Rezabek 2023
Moritz Haid Impact of a TEE on QUIC Performance BA Marcel Kempf, Filip Rezabek, Johannes Zirngibl, Benedikt Jaeger 2023
Jonas Herz Secure light-weight low-latency virtual networking BA Florian Wiedner, Filip Rezabek 2023
Simon Borowski Structure and Performance of Smart Contracts in Different Ecosystems MA Filip Rezabek, Kilian Glas, Richard von Seck 2022
Shouvik Ghosh Parshant Singh Extension of the EnGINE Framework and Profiling Blockchains to Identify and Optimize Bottlenecks IDP Filip Rezabek, Richard von Seck 2022
Andreas Kramer Performance Evaluation of Privacy Enhancing Infrastructure MA Filip Rezabek, Richard von Seck 2022
Andrei-Cosmin Aprodu Providing Network Layer Privacy to Blockchain Protocols IDP Filip Rezabek, Richard von Seck 2022
Christoph Schnabl Private Group Management for Mix Networks BA Daniel Hugenroth, Filip Rezabek, Richard von Seck 2022
Johannes Pfannschmidt Feasibility Study of Threshold BLS Signature Scheme for Tamper-Resistance Signature Service BA Filip Rezabek, Richard von Seck, Dr. Holger Kinkelin 2022
Timo Michael Saunus Software-based Security for Intellectual Property and Collaboration MA Richard von Seck, Filip Rezabek, Holger Kinkelin 2022
Justus von der Beek TEE Support for Digital Data Marketplaces IDP Filip Rezabek, Holger Kinkelin, Richard von Seck 2022
Filip Rezabek A Fault-Proof and Tamper-Resistant Certificate Issuance Process MA Dr. Holger Kinkelin, Dr. Jorge Cuellar 2019
Alexander Bauer Evaluation of Distributed Ledger Technology in Automotive Scenarios MA Dr. Holger Kinkelin, Dr. Heiko Niedermayer 2018
Marc Müller Trustworthy and tamperproof configuration management of networked devices MA Dr. Holger Kinkelin, Cora-Lisa Perner, Dr. Heiko Niedermayer 2018

Open and running student theses

Author Title Type Advisors Year Links
Eddie Groh Evaluation of Data Availability Sampling Schemes IDP Kilian Glas, Filip Rezabek 2024
Thomas Wagner Quantifying Cross-Chain Rebalancing Arbitrage Between Ethereum and Polygon MA Burak Öz, Filip Rezabek 2024
Murad Muradli Detection and Analysis of Cross-Chain Arbitrages Between Ethereum and Polygon MA Burak Öz, Filip Rezabek 2024
Aleksandar Vasilev Assessment of Transactions Ordering of First-Come-First-Serve Blockchains in the Wild MA Filip Rezabek, Kilian Glas, Burak Öz 2024
Cem Denizsel Assessment of zk-EVM Attestations Approaches MA Filip Rezabek, Kilian Glas 2024