Dr.-Ing. Katharina Kohls

  • Postdoc - Chair Systems Security
  • Former PhD - Research Group Wireless Security
Kohls, Katharina

Address

Ruhr Uni­ver­si­ty Bo­chum
Chair for Sys­tems Se­cu­ri­ty
Uni­ver­si­täts­stras­se 150
44780 Bo­chum / Ger­ma­ny

Room
ID 2/126
Phone:
(+49)(0)234 / 32 - 26991
Email:
katharina.kohls@rub.de

Vita

  • Postdoctoral Researcher (CASA, Ruhr University Bochum)
  • Dr.-Ing. (Ruhr University Bochum)
  • Doc­to­ral Re­se­ar­cher (Information Security Group, Ruhr University Bochum)
  • M.Sc. Applied Computer Science (Ruhr University Bochum)

Research

My research focuses on anonymity and privacy enhancing technologies. In particular, I am interested in distributed communication systems that allow to protect sensitive information, e.g., use identities, even in the presence of large-scale adversaries. Examples of these are traffic analysis attacks against Tor or LTE networks, as well as countermeasures against this. Further aspects of my research cover human aspects of such systems.

Projects

  • Traffic analysis attacks and countermeasures
  • Internet censorship and its circumvention
  • Human aspects of privacy

Publications

2019
Breaking LTE on Layer Two

David Rupprecht, Katharina Kohls, Christina Pöpper, Thorsten Holz - IEEE Symposium on Security & Privacy (Oakland), May 2019

POSTER: Application-Layer Routing Attacks on Tor

Katharina Kohls, Christina Pöpper - IEEE Symposium on Security & Privacy (Oakland), May 2019

Lost Traffic Encryption: Fingerprinting LTE/4G Traffic on Layer Two

Katharina Kohls, David Rupprecht, Thorsten Holz, Christina Pöpper - Conference on Security and Privacy in Wireless and Mobile Networks (WiSec ’19), May 15–17, 2019, Miami, FL, USA, ACM

Adversarial Attacks Against Automatic Speech Recognition Systems via Psychoacoustic Hiding

Lea Schönherr, Katharina Kohls, Steffen Zeiler, Thorsten Holz, Do­ro­thea Kolossa - Network and Distributed System Security Symposium (NDSS 2019), San Diego, California, USA, February 2019

On the Challenges of Geographical Avoidance for Tor

Katharina Kohls, Kai Jansen, David Rupprecht, Thorsten Holz, Christina Pöpper - Network and Distributed System Security Symposium (NDSS 2019), San Diego, California, USA, February 2019

2018
DigesTor: Comparing Passive Traffic Analysis Attacks on Tor

Katharina Kohls, Christina Pöpper - European Symposium on Research in Computer Security 2018 (ESORICS '18), Barcelona, Spain, September, 2018

2017
POSTER: Traffic Analysis Attacks in Anonymity Networks

Katharina Kohls, Christina Pöpper - ACM Asia Conference on Computer and Communications Security (ASIACCS) 2017

2016
SkypeLine: Robust Hidden Data Transmission for VoIP

Katharina Kohls, Thorsten Holz, Do­ro­thea Kolossa, Christina Pöpper - ACM Symposium on InformAtion, Computer and Communications Security (ASIACCS), Xi'an, May 2016

Neuralyzer: Flexible Expiration Times for the Revocation of Online Data

Apostolis Zarras, Katharina Kohls, Markus Dürmuth, Christina Pöpper - In Proceedings of the ACM Conference on Data and Application Security and Privacy (ACM CODASPY) 2016 *** OUTSTANDING PAPER AWARD ***

Technical Report: SkypeLine Robust Hidden Data Transmission for VoIP

Katharina Kohls, Thorsten Holz, Do­ro­thea Kolossa, Christina Pöpper - TR-HGI-2016-001, Ruhr-Uni­ver­si­tät Bo­chum, Horst Görtz In­sti­tut für IT-Si­cher­heit (HGI), February 2016