Hi, I conduct research on cyber security methodology and terminology/taxonomy, especially focusing on Internet censorship and information hiding.

Some of my fundamental papers

• surveying Internet censorship (COSE, 2025)
• introduction of covert channel amplification and history covert channels (IEEE TDSC, 2025)
• introduction of a generic taxonomy for steganography and a method to describe new covert channels in papers (ACM CSUR, 2025)
• introduction of hiding patterns (a taxonomy for covert channels), preprint (ACM CSUR, 2015)

About me

• 2024-now: professor at Ulm University: chair (institute of information resource management (IRM)) and director (kiz)

Previous positions:

• 2020-2025: lecturer (Priv.-Doz.), FernUniversität in Hagen
• 2016-2024: professor of information security and computer networks, Hochschule Worms, including several years as scientific director of the Center for Technology and Transfer (ZTT)
• 2014-2020: habilitation (Dr. habil), Faculty of Mathematics and Computer Science, FernUniversität in Hagen
• 2013-2020: PostDoc, Dep. Cyber Security, Fraunhofer FKIE, Bonn
• 2010-2013: PhD (Dr. rer. nat.), Faculty of Mathematics and Computer Science, FernUniversität in Hagen
• since 2003: author of several Linux books (most recent book, PDF of our Linux Openbook (German, 2011))

Academic Profiles: Google Scholar, DBLP, ResearchGate, Mastodon: @cdpxe@dju.social.

Contact: steffen (at) wendzel (dot) de.