Decentralized Systems and Network Services Research Group
Under the term "Decentralized Systems and Network Services" we understand distributed and networked technical systems that span over more than one administrative domain. Hence, their operation depends on more than one party. Our research focuses on:
- Blockchains, consensus and peer-to-peer networks
- Network Security Monitoring
- Secure and privacy-aware computing in partially trustworthy environments.
News
We present a demonstration titled Practical Trade-Offs in Integrity Protection for Binaries via Ethereum at this year's ACM/IFIP Middleware (Video). We show the practicability of our concept and how revocations of software binaries can be communicated to users in a timely manner. We also briefly touch on trade-offs that arise in a practical deployment.
At Virtual Zeek Week 2020, we presented the Emojifier and the current state of our work on the Packet Analyzer Framework for Zeek. The framework enables the flexible addition of protocols at lower network layers and thus opens up new possibilities for monitoring networked systems, for example in the context of critical infrastructures.
We present our publication Fundamental Properties of the Layer Below a Payment Channel Network (Abstract-Video) at the 4th International Workshop on Cryptocurrencies and Blockchain Technology (CBT 2020). We show which properties are required for the first layer below a payment channel network and that a first layer cannot only be implemented by a blockchain.
Die Nachklausur wird am 27.07. um 8:00 Uhr im Tulla-Hörsaal (Geb 11.40) stattfinden.
Die Anmeldung im CAS ist ab jetzt bis zum 20.07., 23:59 Uhr möglich. Eine Online-Abmeldung ist bis zum 26.07. um 23:59 Uhr möglich.
Für die Klausur sind keine Hilfsmittel (außer einem Wörterbuch) zugelassen. Sollten Sie ein Wörterbuch verwenden wollen, muss dieses beim Einlass von der Aufsicht überprüft werden.
Weitere Informationen zur Koordinierung des Einlasses und zur Beachtung des Infektionsschutzes werden rechtzeitig vor der Klausur an die Teilnehmer/-innen übermittelt.
On September, 17th and 18th the 4th International Workshop on Cryptocurrencies and Blockchain Technology" (CBT 2020) will take place, co-located with ESORICS 2020. Prof. Hartenstein will serve on the program commitee of the workshop. We encourage submissions related to cryptocurrencies and blockchain technology (see call for papers).
At the 25th ACM Symposium on Access Control Models and Technologies, we presented our paper Matrix Decomposition: Analysis of an Access Control Approach on Transaction-based DAGs without Finality. In this paper, we decompose, abstract and analyze the access control approach of the Matrix middleware for decentralized applications, and show that Matrix can be seen as a Distributed Ledger Technology without strict Consensus. This has interesting consequences when compared to traditional access control approaches, which we discuss as well.
The talk was recorded, and will be publishde by SACMAT at a later date. The publication was also the topic of this blog post on Matrix.org, which covers the Matrix.org view on our findings.