Markus Sosnowski, M.Sc.

Research Associate

Postal address

  • Institut für Informatik der
  • Technischen Universität München
  • Lehrstuhl I8
  • Boltzmannstr. 3
  • 85748 Garching bei München - Germany

Contact

Consultation hours

By arrangement

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

Supervised Theses

In progress

Student Title Type Advisors Year Links
Jonas Merforth Modeling Web Page Performance Improvements via Loading Graphs and Testbed Simulations MA Markus Sosnowski, Florian Wiedner 2024

Finished

Author Title Type Advisors Year Links
Tim Betzer Graph-based Modeling and Analysis of the TLS Ecosystem MA Markus Sosnowski 2024
Lukas Bernwald Towards Consistency in Distributed REST API Caching MA Markus Sosnowski, Richard von Seck 2023
Dan Bachar Enhancing Distributed REST APIs on the Fly BA Markus Sosnowski, Florian Wiedner 2023
Désirée Rentz Testing and Grading of Low-Layer Network Programming Assignments Using Concepts of Behavior Driven Development BA Markus Sosnowski, Leander Seidlitz, Manuel Simon, Stephan Günther 2023
Robert Dillitz Transformation and Evaluation of TLS Behavior Graphs MA Johannes Zirngibl, Benedikt Jaeger, Markus Sosnowski 2022
Rene Jung Detecting the Internet Presence of Organizations Utilizing the Graph Structure of the TLS Ecosystem BA Markus Sosnowski, Patrick Sattler 2022
Tim Betzer Propagate Distrust Among Servers Utilizing the Graph Structure of the TLS Ecosystem IDP Markus Sosnowski 2022
Jonas Lang Towards an Internet-Wide Certificate Revocation Observatory IDP Juliane Aulbach, Markus Sosnowski, Patrick Sattler 2022
Felix Myhsok Blocklists: Who is blocked? BA Johannes Zirngibl, Patrick Sattler, Markus Sosnowski 2021
Yannik Gehring Revealing Organizational Structures in an Internet-wide TLS Graph MA Markus Sosnowski, Patrick Sattler, Juliane Aulbach 2021
Jonas Lang Large Scale TLS Certificate Revocation Analysis BA Juliane Aulbach, Markus Sosnowski 2021
Tim Betzer A Systematic TLS Scanning Approach Minimizing the Used Requests and Comparison with other TLS Scanners GR Markus Sosnowski, Patrick Sattler 2021
Michael Haden Intrusion Detection using Streaming Network Telemetry IDP Kilian Holzinger, Markus Sosnowski, Simon Bauer 2021
Christian Kilb Blocklists: What is blocked and why? IDP Johannes Zirngibl, Patrick Sattler, Markus Sosnowski 2020
Justus Fries Graph-based Analysis of Server TLS Parameters IDP Markus Sosnowski, Patrick Sattler, Lars Wüstrich 2020
Muhammed Sahin Analysis of Servers use of TLS Parameters IDP Patrick Sattler, Markus Sosnowski, Lars Wüstrich, Max Helm 2020
Tim Betzer Maximize Information Gain from Internet Scans while Minimizing Impact BA Markus Sosnowski, Patrick Sattler 2020

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] [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]