Dr. rer. nat. Christian Berger

Dr. Christian Berger

Department Informatik (INF)
Lehrstuhl für Informatik 4 (Systemsoftware)

Raum: Raum 0.037
Martensstr. 1
91058 Erlangen
   
Appointments by prior arrangement

My research focuses on:

  • Byzantine Fault Tolerance
  • State Machine Replication
  • Consensus Algorithms
  • Blockchain Systems & Distributed Ledger Technology

Bio

I obtained my Bachelor’s and Master’s degrees in Computer Science in 2014 and 2017, respectively, from the University of Passau, Germany. In 2018 I worked as software engineer for the msg systems AG. In 2019, I began working as a research assistant and PhD candidate under Prof. Dr. Hans Reiser at the Chair of Security in Information Systems at the University of Passau. My research interests include Byzantine fault-tolerant consensus and state machine replication algorithms, as well as distributed ledger technologies. In November 2024, I graduated as a Dr. rer. nat. at the Faculty of Computer Science and Mathematics at the University of Passau.
 
Memberships:
  • Member of the IEEE Computer Society, ACM, and GI (Gesellschaft für Informatik)
Open-Source Activity:
  • Maintainer of the BFT-SMaRt project on GitHub (a modern replication library for BFT)
  • Owner of the Delphi-BFT project on GitHub (a tool for automating large-scale simulations of replication protocols)
Review Activities:
  • Reviewer for the following journals:
    • IEEE Transactions on Dependable and Secure Computing
    • ACM Journal of Parallel and Distributed Computing
    • Science of Computer Programming
    • Blockchain: Research and Applications
    • Computer Communications
Awards: Interests:
  • Reliable distributed systems
  • Byzantine fault-tolerant consensus and replication
  • Distributed ledger technologies, blockchain systems, and DeFi
 

Publications

 
 
2024
(new) Christian Berger. Towards Fast and Adaptive Byzantine State Machine Replication for Planetary-Scale SystemsPhD Thesis. Accepted by the Faculty of Computer Science and Mathematics at the University of Passau. November 2024.
(new) Christian Berger, Sadok Ben Toumia, Hans P. Reiser. Exploring Scalability of BFT Blockchain Protocols through Network Simulations.  ACM Formal Aspects of Computing. Accepted in July 2024. ACM
(new) Christian Berger, Hans P. Reiser. Poster: Optimizing Tree-based Quorum Certification for BFT Systems at Planetary-Scale54th Annual IEEE/IFIP International Conference on Dependable Systems and Networks-Supplemental Volume (DSN-S). June 2024. IEEEXplore
(new) Christian Berger, Lívio Rodrigues, Hans P. Reiser, Vinícius Cogo, Alysson Bessani. Chasing Lightspeed Consensus: Fast Wide-Area Byzantine Replication with MercuryThe 25th ACM/IFIP International Middleware Conference (MIDDLEWARE’24). December 2024. Preprint          Talk @ ConsensusDays
2023
Christian Berger, Signe Schwarz-Rüsch, Arne Vogel, Kai Bleeke, Leander Jehl, Hans P. Reiser, Rüdiger Kapitza.  SoK: Scalability Techniques for BFT ConsensusThe 5th IEEE International Conference on Blockchain and Cryptocurrency. May 2023. Preprint
(Talk) Christian Berger, Sadok Ben Toumia,  Hans P. Reiser. Skalierbare Performance-Simulation von fehlertoleranten verteilten Systemen. Frühjahrstreffen der GI-Fachgruppen „Betriebssysteme“ (FGBS) und „Fehlertolerierende Rechensysteme“ (FERS). Dresden, März 2023.
Christian Berger, Sadok Ben Toumia,  Hans P. Reiser.  Scalable Performance Evaluation of Byzantine Fault-Tolerant Systems Using Network SimulationThe 28th IEEE Pacific Rim International Symposium on Dependable Computing (PRDC 2023) . October 2023.
  2022
Christian Berger, Hans P. Reiser, Franz J. Hauck, Florian Held, Jörg Domaschka.  Automatic Integration of BFT State-Machine Replication into IoT SystemsThe 18th European Dependable Computing Conference (EDCC’22). September 2022. Preprint
Sadok Ben Toumia, Christian Berger, Hans P. Reiser. Evaluating Blockchain Application Requirements and their Satisfaction in Hyperledger FabricThe 22th IFIP International Conference on Distributed Applications and Interoperable Systems (DAIS). June 2022. Preprint
Christian Berger, Sadok Ben Toumia,  Hans P. Reiser. Does my BFT protocol implementation scale?The 3rd International Workshop on Distributed Infrastructure for Common Good (DICG). November 2022. Researchgate            ACM
Christian Berger. Fast and adaptive BFT state machine replicationThe 23rd International Middleware Conference Doctoral Symposium. November 2022. ACM
  2021
Christian Berger, Hans P. Reiser and Alysson Bessani. Making Reads in BFT State Machine Replication Fast, Linearizable, and Live.  The 40th IEEE International Symposium on Reliable Distributed Systems (SRDS).  September 2021. (received the SRDS’21 Prof. C.V. Ramamoorthy Best Paper Award) Arxiv.org       Youtube         IEEEXplore
Christian Berger, Philipp Eichhammer, Hans P. Reiser, Jörg Domaschka, Franz J. Hauck, and Gerhard Habiger. A Survey on Resilience in the IoT: Taxonomy, Classification and Discussion of Resilience MechanismsACM Computing Surveys. 54, 7, Article 147 (September 2021), 39 pages. Preprint     ACM      OpenAccess
  2020
Christian Berger, Hans P. Reiser, João Sousa, and Alysson Bessani. AWARE: Adaptive Wide-Area Replication for Fast and Resilient Byzantine ConsensusIEEE Transactions on Dependable and Secure Computing (TDSC). Accepted in October 2020. DOI
Christian Berger. Towards Environmental-Adaptive and Performance-Resilient Consensus in Distributed Ledger TechnologyThe 21st International Middleware Conference Doctoral Symposium (Middleware ’20 Doctoral Symposium). Accepted in October 2020. DOI YouTube
2019
Philipp Eichhammer, Christian Berger, Hans P. Reiser, Jörg Domaschka, Franz J. Hauck, Gerhard Habiger,  Frank Griesinger, Jakob Pietron.  Towards a Robust, Self-Organizing IoT Platform for Secure and Dependable Service ExecutionTagungsband des FB-SYS Herbsttreffens 2019. Bonn: Gesellschaft für Informatik e.V.. 2019. DOI
Jörg Domaschka, Christian Berger, Hans P. Reiser, Philipp Eichhammer, Frank Griesinger, Jakob Pietron, Matthias Tichy, Franz J. Hauck, Gerhard Habiger. SORRIR: A Resilient Self-organizing Middleware for IoT Applications [Position Paper]The 6th International Workshop on Middleware and Applications for the Internet of Things (M4IoT) (co-located with the  the 2019 ACM/IFIP/USENIX International Middleware Conference).  December 2019. DOI BibTex
Christian Berger, Hans P. Reiser, João Sousa, Alysson Bessani. Resilient Wide-Area Byzantine Consensus Using Adaptive Weighted Replication. The 38th IEEE International Symposium on Reliable Distributed Systems (SRDS). October 2019. (selected as one of the three best paper candidates on SRDS’19) DOI Poster Presentation BibTeX
2018
Christian Berger, Hans P. Reiser. Scaling Byzantine Consensus: A Broad AnalysisThe 2nd Workshop on Scalable and Resilient Infrastructures for Distributed Ledgers (SERIAL)  (co-located with the  the 2018 ACM/IFIP/USENIX International Middleware Conference). December 2018. DOI BibTeX
Christian Berger, Hans P. Reiser. WebBFT: Byzantine Fault Tolerance for Resilient Interactive Web ApplicationsThe 18th IFIP International Conference on Distributed Applications and Interoperable Systems (DAIS). June 2018. DOI BibTeX