About me

I am a professor of information security and computer networks at Worms University of Applied Sciences (founder of the network security research group and deputy scientific head of the centre of technology and transfer) and also affiliated with Fraunhofer FKIE (where I was head of a security research team for three years). I received my Ph.D. (Dr. rer. nat.) and my Habilitation (Dr. habil.) from the University of Hagen in 2013 and 2020, respectively.

A list of my mostly academic 150+ publications can be found here. However, I also wrote books about the Linux operating system and contributed open source code/patches to the free software community. There is also a list of selected talks that I gave.

My research focuses on distributed systems security, network information hiding (network covert channels and network steganography), science of security (SoC), CPS/IoT/smart buildings security, security of embedded communication protocols, and information security terminology/taxonomy.

Some of my key publications are on the fundamentals (SoC) of network information hiding: taxonomy/patterns/fundamentals [1,2], scientific methodology of information hiding [3], traffic normalization for IoT/CPS [4] and active wardens (e.g. [5,6]) and covert channel optimization [7,8].

I am a member of several steering committees, initiatives, program and organizing committees (cf. details). I am (or was) lecturing and supervising at Augsburg University of Applied Sciences, Bonn University and Hagen University. A list of my projects, both funded and spare-time software projects, is also available.

In addition to information security, I am interested in university history, campus novels, and retro computing – in particular: operating system history and historic network protocols. I own a small collection of rather historic books on these retro computing topics. Since about five years, I am also a mid-distance runner (5km to half-marathon).

Find (information about) me here: Twitter, Google Scholar and ResearchGate.

Contact: steffen (at) wendzel (dot) de (PGP pub key: FD701BD1).

Recent News (Selection):





  • I made my habilitation thesis available as a PDF file. If you want a printed copy, I can send you one :)



  • New funding! We will receive 185.000 EUR from the MWWK/RLP for our project AI-driven Secure Aging for Pandemy-resilient Digital Infrastructures (German: KI-gestütztes sicheres Altern für eine pandemieresiliente digitale Infrastruktur, KISAT) from now till 2022.
    This is the third successful funding proposal which I authored or co-authored this year, resulting in approximately 923.000 EUR so far. Awesome! Also, we finished one industry project this year, resulting in another almost 40.000 EUR.


  • It is done! Seven years after completion of my Ph.D. (Dr. rer. nat.), I now also passed my habilitation exam (Dr. habil.)! I am so, so, so glad!


  • My tool NeFiAS (Network Forensic & Anomaly Detection System) is an accessible hands-on tool for network covert channel detection. I just made the code of NeFiAS public. I also attached a documentation. Have fun with it!


  • Great news! Our research project SIVERT (English: Secure and Intelligent Visualization and Real-time Reconstruction Techniques for Proton computed tomography, German: Sichere und Intelligente Visualisierungs- und Echtzeit-Rekonstruktions-Techniken für die Protonen-Computertomografie) was started today. Minister president Malu Dreyer came to initiate the project on October 1st. We receive quite some funding from the Rhineland-Palatinate/MWWK (717.000 EUR) for six PhD students, student assistants and travel budget for the next couple of years and will conduct AI-aided research to improve cancer treatment (also in terms of safety) jointly with TU Kaiserslautern and University of Bergen. Looking forward to post more information on this in the coming months.


  • Recently gave a lecture (in German) on process management in operating systems at University of Hagen. Slides are here.


  • Two new posters have been accepted at EICC'20: 
    • Jörg Keller, Steffen Wendzel: Covert Channels in One-Time Passwords Based on Hash Chains, in Proc. European Interdisciplinary Cybersecurity Conference (EICC 2020), ACM, in press.
    • Laura Hartmann, Steffen Wendzel: Anomaly Detection in ICS based on Data-history Analysis, in Proc. European Interdisciplinary Cybersecurity Conference (EICC 2020), ACM, in press.
  • Our new special issue on Information Security Methodology, Replication Studies and Education at the Journal of Universal Computer Science has been published; featuring selected extended articles of last year's ARES IWSMR workshop.