Research Interests
- Virtual currencies (Bitcoin)
- Steganography and steganalysis
Positions
| since 08/2019 | Software Engineer, Uber B.V., Amsterdam, The Netherlands |
| 10/2016 – 08/2019 | Research Assistant, Department of Computer Science, University of Innsbruck, Austria |
| 03/2015 – 09/2016 | Research Assistant, Department of Information Systems, working for the University of Münster at the German Federal Criminal Police Office (BKA) on the BITCRIME project, Germany |
| 03/2011 – 12/2014 | Student Assistant, Department of Information Systems, University of Münster, Germany |
| 10/2013 – 03/2014 | Student Assistant, Department of Mathematics and Computer Science, University of Münster, Germany |
| 07/2011 – 09/2011 | Research Intern, Radar Video Enhancement, Thales Nederland B.V., The Netherlands |
Education
| since 10/2016 | Ph.D. studies in Computer Science, University of Innsbruck, Austria |
| 10/2013 – 02/2015 | M.Sc. in Computer Science, University of Münster, Germany |
| 10/2010 – 09/2013 | B.Sc. in Computer Science, University of Münster, Germany |
Publications
- Grzywotz, J., Köhler, O.M., and Rückert, C. Cybercrime mit Bitcoins – Straftaten mit virtuellen Währungen, deren Verfolgung und Prävention. Strafverteidiger, 36, 11 (2016), 753–759.
- Köhler, O.M., Pasquini, C., and Böhme, R. On the Statistical Properties of Syndrome Trellis Coding. In C. Krätzer, Y.-Q. Shi, J. Dittmann and H.-J. Kim, eds., Digital Forensics and Watermarking, 16th International Workshop, IWDW 2017. Lecture Notes in Computer Science 10431, Springer, Cham, 2017, pp. 331–346.
- Köhler, O.M., Pasquini, C., and Böhme, R. Verbesserung der Syndrome-Trellis-Kodierung zur Erhöhung der Unvorhersagbarkeit von Einbettpositionen in steganographischen Systemen. In H. Langweg and M. Meier, eds., Sicherheit 2018 – Sicherheit, Schutz und Zuverlässigkeit. Lecture Notes in Informatics, Gesellschaft für Informatik, Bonn, 2018, pp. 83–94.