Markus Sosnowski, M.Sc.

Research

software development, software- / enterprise architectures, and large computer networks,
understanding and modeling the Internet with active measurements,
focus on the TLS ecosystem and derivable security related insights,
Content Delivery Networks (CDNs) and novel approaches to model, distribute, and cache application data.

Teaching

Summer term 2025: Teaching Assistant for Grundlagen Rechnernetze und Verteilte Systeme
Summer term 2024: Teaching Assistant for Grundlagen Rechnernetze und Verteilte Systeme
Summer term 2023: Teaching Assistant for Grundlagen Rechnernetze und Verteilte Systeme
Summer term 2022: Teaching Assistant for Grundlagen Rechnernetze und Verteilte Systeme
Summer term 2021: Teaching Assistant for Grundlagen Rechnernetze und Verteilte Systeme
Summer term 2020: Teaching Assistant for Grundlagen Rechnernetze und Verteilte Systeme
Since Summer 2020: Seminar IITM (advisor)

Publications

2024-10-01	Markus Sosnowski, Richard von Seck, Florian Wiedner, Georg Carle, “CRDT Web Caching: Enabling Distributed Writes and Fast Cache Consistency for REST APIs,” in Proc. 20th International Conference on Network and Service Management (CNSM), Prague, Czech Republic, Oct. 2024. [Pdf] [Homepage] [DOI] [Bib]
2024-07-01	Markus Sosnowski, Johannes Zirngibl, Patrick Sattler, Juliane Aulbach, Jonas Lang, Georg Carle, “An Internet-wide View on HTTPS Certificate Revocations: Observing the Revival of CRLs via Active TLS Scans,” in Proc. IEEE European Symposium on Security and Privacy Workshops (EuroS&PW), Jul. 2024. [Pdf] [DOI] [Bib]
2024-06-01	Markus Sosnowski, Johannes Zirngibl, Patrick Sattler, Georg Carle, Claas Grohnfeldt, Michele Russo, Daniele Sgandurra, “EFACTLS: Effective Active TLS Fingerprinting for Large-scale Server Deployment Characterization,” IEEE Transactions on Network and Service Management, vol. 21, no. 3, pp. 2582–2595, Jun. 2024. [Homepage] [Rawdata] [DOI] [Bib]
2024-05-01	Markus Sosnowski, Patrick Sattler, Johannes Zirngibl, Tim Betzer, Georg Carle, “Propagating Threat Scores With a TLS Ecosystem Graph Model Derived by Active Measurements,” in Proc. Network Traffic Measurement and Analysis Conference (TMA), May 2024. [Pdf] [Slides] [Homepage] [DOI] [Bib]
2024-03-01	Johannes Zirngibl, Florian Gebauer, Patrick Sattler, Markus Sosnowski, Georg Carle, “QUIC Hunter: Finding QUIC Deployments and Identifying Server Libraries Across the Internet,” in Passive and Active Measurement Conference (PAM), Mar. 2024. [Homepage] [DOI] [Bib]
2023-12-01	Markus Sosnowski, Florian Wiedner, Eric Hauser, Lion Steger, Dimitrios Schoinianakis, Sebastian Gallenmüller, Georg Carle, “The Performance of Post-Quantum TLS 1.3,” in Proc. International Conference on emerging Networking EXperiments and Technologies (CoNEXT), Paris, France, Dec. 2023. [Pdf] [Preprint] [Slides] [Homepage] [Recording] [DOI] [Bib]
2023-03-01	Markus Sosnowski, Johannes Zirngibl, Patrick Sattler, Georg Carle, “DissecTLS: A Scalable Active Scanner for TLS Server Configurations, Capabilities, and TLS Fingerprinting,” in Passive and Active Measurement, Mar. 2023, pp. 110–126. [Pdf] [Homepage] [Rawdata] [DOI] [Bib]
2022-06-01	Markus Sosnowski, Johannes Zirngibl, Patrick Sattler, Georg Carle, Claas Grohnfeldt, Michele Russo, Daniele Sgandurra, “Active TLS Stack Fingerprinting: Characterizing TLS Server Deployments at Scale,” in Proc. Network Traffic Measurement and Analysis Conference (TMA), Jun. 2022. Best Paper Award [Pdf] [Slides] [Homepage] [Rawdata] [Bib]