Novel (end user) technologies emerge at a rapidly accelerating pace. In particular technologies for use in public or semi-public spaces are subject to so-called user-centered threats, that is attackers trying to exploit weaknesses in human behavior. Examples include but are not limited to so-called observation attacks (shoulder surfing), reconstruction attacks (smudge attacks, thermal attacks) and mimicry attacks. 

In our work we obtain an in-depth understanding of the attack vectors (including human behavior enabling such attacks / during such attacks) and look into how these can be mitigated. To this end, we focus on a large variety of scenarios, including but not limited to the use of sensitive information in public space, working environments, and Mixed Reality.

Outcomes of our work are recommendations for and the support of behavior changes as well as user interfaces that seek to protect users through in-situ interventions. 

Projekte

Scalable Biometrics
Scalable Biometrics

In diesem Projekt untersuchen wir wie Umgebungen in welchen Computer und Sensoren allgegenwärtig sind genutzt werden können um Nutzer mithilfe verhaltensbiometrischer Systeme zu identifizieren und zu authentifizieren. Ziel ist es herauszufinden, wie solche verhaltensbiometrischen Ansätze unter Veränderungen von Umgebung, Anzahl der Personen und ihrer Eigenschaften sowie der verwendeten Technologie skalieren.

Publications

Selected Publications

schneegass2022mobilehci.jpg Stefan Schneegass, Alia Saad, Roman Heger, Sarah Delgado Rodriguez, Romina Poguntke und Florian Alt. An Investigation of Shoulder Surfing Attacks on Touch-Based Unlock Events. In Proc. ACM Hum.-Comput. Interact., 6, [Download Bibtex]  
abdrabou2022avi.jpg Yasmeen Abdrabou, Sheikh Radiah Rivu, Tarek Ammar, Jonathan Liebers, Alia Saad, Carina Liebers, Uwe Gruenefeld, Pascal Knierim, Mohamed Khamis, Ville Mäkelä, Stefan Schneegass und Florian Alt. Understanding Shoulder Surfer Behavior and Attack Patterns Using Virtual Reality. In Proceedings of the International Conference on Advanced Visual Interfaces. AVI '22. Association for Computing Machinery, New York, NY, USA. [Download Bibtex]  
abdrabou2022ieeevr.jpg Yasmeen Abdrabou, Radiah Rivu, Tarek Ammar, Jonathan Liebers, Alia Saad, Carina Liebers, Uwe Gruenefeld, Pascal Knierim, Mohamed Khamis, Ville Mäkelä, Stefan Schneegass und Florian Alt. Understanding Shoulder Surfer Behavior Using Virtual Reality. In Adjunct Proceedings of the IEEE Conference on Virtual Reality and 3D User Interfaces. [Download Bibtex]