51±ľÉ«

About

Sebastian Zillien is a research associate and doctoral candidate at the Institute of Organization and Management of Information Systems (OMI) at Ulm University. He received his Bachelor’s degree in 2018 and his Master’s degree in 2020 from Worms University of Applied Sciences.

Since 2016, he has been working as a research associate, focusing on network security, particularly on Covert Channels as well as their analysis, detection, and application.

As part of his academic work, he has been involved in several research projects, including KIASH, EMPOWER, and ATTRIBUT, contributing to various research and development activities.

Research

  • Network Information Hiding (Covert Channels, Optimization, Detection)
  • Internet Censorship (Circumvention & Measurement)

Publications

21.
, , , , RĂĽnz P, Caviglione L. A Survey of Internet Censorship and its Measurement: Methodology, Trends, and Challenges. Computers & Security. 2026; 1641       
20.
Velinov A, Mileva A, , , . Steganography in the QUIC Communication Protocol. Journal of Universal Computer Science (J.UCS). 2026; 32(2):181-208.       
19.
Gross F, Petrov D, Ruffing P, , . A Warden to Analyze and Counter Stegomalware Activities. In: Proc. ARES Workshops 2026. Springer; 2026       
18.
, , Zander S. AMPhitryon: Efficient small data compression for low-bandwidth covert channels. In: Proc. 41st ICT Systems Security and Privacy Protection (IFIP SEC 2026). Springer; 2026       
17.
, , , RĂĽnz P, Caviglione L, . Digital Control: National Tactics of Internet Censorship. In: European Interdisciplinary Cybersecurity Conference (EICC 2026). Springer; 2026       
16.
, , . Internetzensur: Was ist das? Wie funktioniert sie? Was für Auswirkungen hat sie?. In: Hans-Christian Pust, editors. Weggesperrt!? Geheimes Wissen und verbotene Bücher. Stuttgart: Kröner / Württembergische Landesbibliothek; 2026 p. 128-129.
15.
Zillmann W, , , , . Exponat zum Thema Internetzensur. 2026       
14.
, Caviglione L, Mazurczyk W, Mileva A, Dittmann J, Krätzer C, Lamshöft K, Vielhauer C, Hartmann L, Keller J, Neubert T, . A Generic Taxonomy for Steganography Methods. ACM Comput. Surv.. 2025             
13.
, Schmidbauer T, , Keller J. DYST (Did You See That?): An Amplified Covert Channel That Points To Previously Seen Data. IEEE Transactions on Dependable and Secure Computing (TDSC). 2025; 22(1):614-631.             
12.
Petrov D, Ruffing P, , . Domainator: Detecting and Identifying DNS-Tunneling Malware Using Metadata Sequences. In: Dalla Preda, Mila and Schrittwieser, Sebastian and Naessens, Vincent and De Sutter, Bjorn, editors. Availability, Reliability and Security. Cham: Springer Nature Switzerland; 2025 p. 118—140.

Open Theses and Projects

3.
Censorship Circumvention Techniques and Measurements [Bachelor/Master].
2.
Fuzzing for Censorship Circumvention [Bachelor/Master]. 2025
1.
Evaluation of Tor Obfuscation Extensions [Bachelor/Master]. 2024